TY  - JOUR
AU  - Barjaktarević, Dragana
AU  - Đokić, Veljko
AU  - Bajat, Jelena
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Rakin, Marko
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4056
AB  - On the surface of the ultrafine-grained Ti-13Nb-13Zr alloy and the coarse-grained Ti-13Nb-13Zr alloy nanotubular oxide layers were formed by electrochemical anodization in the 1 M H3PO4 + NaF electrolyte in order to evaluate the electrochemical behaviour in the artificial saliva. SEM images showed that homogeneous nanotubular oxide layers could be formed by anodic oxidation of titanium alloys in an electrolyte with fluoride ions. These two titanium alloys, like other materials developed to replace the bone tissue in the human body, have to be highly corrosion resistant, which is one of the most common requirement in terms of the biocompatibility, damage and fracture prevention. The alloys were analysed by means of the electrochemical impedance spectroscopy and potentiodynamic polarization. The analyzed alloys had good corrosion stability, while nanotubular oxide layer improved their corrosion resistance.
PB  - Elsevier, Amsterdam
T2  - Theoretical and Applied Fracture Mechanics
T1  - The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti-13Nb-13Zr alloy in artificial saliva
VL  - 103
DO  - 10.1016/j.tafmec.2019.102307
ER  - 

@article{
author = "Barjaktarević, Dragana and Đokić, Veljko and Bajat, Jelena and Dimić, Ivana and Cvijović-Alagić, Ivana and Rakin, Marko",
year = "2019",
abstract = "On the surface of the ultrafine-grained Ti-13Nb-13Zr alloy and the coarse-grained Ti-13Nb-13Zr alloy nanotubular oxide layers were formed by electrochemical anodization in the 1 M H3PO4 + NaF electrolyte in order to evaluate the electrochemical behaviour in the artificial saliva. SEM images showed that homogeneous nanotubular oxide layers could be formed by anodic oxidation of titanium alloys in an electrolyte with fluoride ions. These two titanium alloys, like other materials developed to replace the bone tissue in the human body, have to be highly corrosion resistant, which is one of the most common requirement in terms of the biocompatibility, damage and fracture prevention. The alloys were analysed by means of the electrochemical impedance spectroscopy and potentiodynamic polarization. The analyzed alloys had good corrosion stability, while nanotubular oxide layer improved their corrosion resistance.",
publisher = "Elsevier, Amsterdam",
journal = "Theoretical and Applied Fracture Mechanics",
title = "The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti-13Nb-13Zr alloy in artificial saliva",
volume = "103",
doi = "10.1016/j.tafmec.2019.102307"
}

Barjaktarević, D., Đokić, V., Bajat, J., Dimić, I., Cvijović-Alagić, I.,& Rakin, M.. (2019). The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti-13Nb-13Zr alloy in artificial saliva. in Theoretical and Applied Fracture Mechanics
Elsevier, Amsterdam., 103.
https://doi.org/10.1016/j.tafmec.2019.102307

Barjaktarević D, Đokić V, Bajat J, Dimić I, Cvijović-Alagić I, Rakin M. The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti-13Nb-13Zr alloy in artificial saliva. in Theoretical and Applied Fracture Mechanics. 2019;103.
doi:10.1016/j.tafmec.2019.102307 .

Barjaktarević, Dragana, Đokić, Veljko, Bajat, Jelena, Dimić, Ivana, Cvijović-Alagić, Ivana, Rakin, Marko, "The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti-13Nb-13Zr alloy in artificial saliva" in Theoretical and Applied Fracture Mechanics, 103 (2019),
https://doi.org/10.1016/j.tafmec.2019.102307 . .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Veljović, Đorđe
AU  - Dimić, Ivana
AU  - Đokić, Veljko
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5255
AB  - Primary stability of biomaterials is associated with the mechanical contact of an implant
with the surrounding bone, which is governed by surface properties. The implant often needs
some kind of modification to optimize and improve biological properties of the surface. In the
present study, nanotubular oxide layer on Ti-13Nb-13Zr alloy (coarse-grained, CG, and ultrafine-grained, UFG, obtained by high pressure torsion) alloy was formed by means of electrochemical anodization in the 1M H3PO4 + NaF electrolyte, during 60 and 90 minutes. The atomic force
microscopy (AFM) was studied to characterize the surface topography and it was shown that
highly ordered nanotubular layers were obtained by anodization. Also, results show that increasing anodizing time increases roughness of the surface. The aim of this paper is to determine the
vitro biocompatibility of the titanium alloy after electrochemical anodization. In vitro nanotubular oxide layer examinations were performed on the human fibroblast cell lines (MRC-5). The cytotoxicity of the examined materials was measured as a percent of cell growth inhibition using in
vitro colorimetric methyl-thiazol-tetrazolium (MTT) test. Scanning Electron Microscope (SEM)
observation of MRC-5 cell was performed using a SEM MIRA3 TESCAN which operated at an
accelerating voltage of 4.5 keV. Results show that nanotubular oxide layer formed on the UFG
Ti-13Nb-13Zr alloy during 90 minutes indicates better cells contact and spreading along nanotubular surface.
PB  - Serbian Academy of Sciences and Arts,  Serbia, Belgrade
C3  - Serbian Ceramic Society
T1  - The biocompatibility of nanotubular oxide layer formed on the ultrafine-grained Ti-13Nb-13Zr alloy
SP  - 85
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5255
ER  - 

@conference{
author = "Barjaktarević, Dragana and Veljović, Đorđe and Dimić, Ivana and Đokić, Veljko and Rakin, Marko",
year = "2018",
abstract = "Primary stability of biomaterials is associated with the mechanical contact of an implant
with the surrounding bone, which is governed by surface properties. The implant often needs
some kind of modification to optimize and improve biological properties of the surface. In the
present study, nanotubular oxide layer on Ti-13Nb-13Zr alloy (coarse-grained, CG, and ultrafine-grained, UFG, obtained by high pressure torsion) alloy was formed by means of electrochemical anodization in the 1M H3PO4 + NaF electrolyte, during 60 and 90 minutes. The atomic force
microscopy (AFM) was studied to characterize the surface topography and it was shown that
highly ordered nanotubular layers were obtained by anodization. Also, results show that increasing anodizing time increases roughness of the surface. The aim of this paper is to determine the
vitro biocompatibility of the titanium alloy after electrochemical anodization. In vitro nanotubular oxide layer examinations were performed on the human fibroblast cell lines (MRC-5). The cytotoxicity of the examined materials was measured as a percent of cell growth inhibition using in
vitro colorimetric methyl-thiazol-tetrazolium (MTT) test. Scanning Electron Microscope (SEM)
observation of MRC-5 cell was performed using a SEM MIRA3 TESCAN which operated at an
accelerating voltage of 4.5 keV. Results show that nanotubular oxide layer formed on the UFG
Ti-13Nb-13Zr alloy during 90 minutes indicates better cells contact and spreading along nanotubular surface.",
publisher = "Serbian Academy of Sciences and Arts,  Serbia, Belgrade",
journal = "Serbian Ceramic Society",
title = "The biocompatibility of nanotubular oxide layer formed on the ultrafine-grained Ti-13Nb-13Zr alloy",
pages = "85",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5255"
}

Barjaktarević, D., Veljović, Đ., Dimić, I., Đokić, V.,& Rakin, M.. (2018). The biocompatibility of nanotubular oxide layer formed on the ultrafine-grained Ti-13Nb-13Zr alloy. in Serbian Ceramic Society
Serbian Academy of Sciences and Arts,  Serbia, Belgrade., 85.
https://hdl.handle.net/21.15107/rcub_technorep_5255

Barjaktarević D, Veljović Đ, Dimić I, Đokić V, Rakin M. The biocompatibility of nanotubular oxide layer formed on the ultrafine-grained Ti-13Nb-13Zr alloy. in Serbian Ceramic Society. 2018;:85.
https://hdl.handle.net/21.15107/rcub_technorep_5255 .

Barjaktarević, Dragana, Veljović, Đorđe, Dimić, Ivana, Đokić, Veljko, Rakin, Marko, "The biocompatibility of nanotubular oxide layer formed on the ultrafine-grained Ti-13Nb-13Zr alloy" in Serbian Ceramic Society (2018):85,
https://hdl.handle.net/21.15107/rcub_technorep_5255 .

TY  - CONF
AU  - Đokić, Veljko
AU  - Barjaktarević, Dragana
AU  - Veljović, Đorđe
AU  - Dimić, Ivana
AU  - Kojić, Vesna
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5256
AB  - To improve their biological properties, biomaterials typically need some surface modification. These surface modifications can be classified into four categories: physical, chemical, mechanical and biochemical. One of the most commonly used methods is the electrochemical anodization, which is a simple process used to form nanotubular oxide layer on the metal surface by oxidation. In the present study, nanotubular oxide layer was formed on coarse-grained (CG) Ti-13Nb-13Zr alloy and ultrafine-grained (UFG) Ti-13Nb-13Zr alloy, obtained by high pressure torsion, using electrochemical anodization in the 1M H3PO4 + NaF electrolyte, during 60 minutes and 90 minutes. The scanning electron microscope (SEM) was used to characterize the surface and it showed that homogenous nanotubular layers were obtained by anodization during 90 minutes, while anodization during 60 minutes produced inhomogeneous nanotubular oxide layer. Also, the results show that the nanotubular oxide layer on the UFG Ti-13Nb-13Zr was more homogeneous then the one on CG material. The aim of this study is to determine the in vitro biocompatibility of the titanium alloy before and after electrochemical anodization during 90 minutes. In vitro nanotubular oxide layer examinations were performed on the human (MRC-5) and animal (L929) fibroblast cells lines. The cytotoxicity of the examined materials was measured as a percent of cell growth inhibition using in vitro colorimetric methyl-thiazol-tetrazolium (MTT) test. Results show that nanotubular oxide layer formed on the UFG Ti-13Nb-13Zr alloy during 90 minutes allow better cells contact and spreading along nanotubular surface.
PB  - Programme and The Book of Abstracts, TWENTIETH ANNUAL CONFERENCE YUCOMAT 2018
C3  - Materials Research Society of Srebia
T1  - Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy
SP  - 139
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5256
ER  - 

@conference{
author = "Đokić, Veljko and Barjaktarević, Dragana and Veljović, Đorđe and Dimić, Ivana and Kojić, Vesna and Rakin, Marko",
year = "2018",
abstract = "To improve their biological properties, biomaterials typically need some surface modification. These surface modifications can be classified into four categories: physical, chemical, mechanical and biochemical. One of the most commonly used methods is the electrochemical anodization, which is a simple process used to form nanotubular oxide layer on the metal surface by oxidation. In the present study, nanotubular oxide layer was formed on coarse-grained (CG) Ti-13Nb-13Zr alloy and ultrafine-grained (UFG) Ti-13Nb-13Zr alloy, obtained by high pressure torsion, using electrochemical anodization in the 1M H3PO4 + NaF electrolyte, during 60 minutes and 90 minutes. The scanning electron microscope (SEM) was used to characterize the surface and it showed that homogenous nanotubular layers were obtained by anodization during 90 minutes, while anodization during 60 minutes produced inhomogeneous nanotubular oxide layer. Also, the results show that the nanotubular oxide layer on the UFG Ti-13Nb-13Zr was more homogeneous then the one on CG material. The aim of this study is to determine the in vitro biocompatibility of the titanium alloy before and after electrochemical anodization during 90 minutes. In vitro nanotubular oxide layer examinations were performed on the human (MRC-5) and animal (L929) fibroblast cells lines. The cytotoxicity of the examined materials was measured as a percent of cell growth inhibition using in vitro colorimetric methyl-thiazol-tetrazolium (MTT) test. Results show that nanotubular oxide layer formed on the UFG Ti-13Nb-13Zr alloy during 90 minutes allow better cells contact and spreading along nanotubular surface.",
publisher = "Programme and The Book of Abstracts, TWENTIETH ANNUAL CONFERENCE YUCOMAT 2018",
journal = "Materials Research Society of Srebia",
title = "Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy",
pages = "139",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5256"
}

Đokić, V., Barjaktarević, D., Veljović, Đ., Dimić, I., Kojić, V.,& Rakin, M.. (2018). Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy. in Materials Research Society of Srebia
Programme and The Book of Abstracts, TWENTIETH ANNUAL CONFERENCE YUCOMAT 2018., 139.
https://hdl.handle.net/21.15107/rcub_technorep_5256

Đokić V, Barjaktarević D, Veljović Đ, Dimić I, Kojić V, Rakin M. Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy. in Materials Research Society of Srebia. 2018;:139.
https://hdl.handle.net/21.15107/rcub_technorep_5256 .

Đokić, Veljko, Barjaktarević, Dragana, Veljović, Đorđe, Dimić, Ivana, Kojić, Vesna, Rakin, Marko, "Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy" in Materials Research Society of Srebia (2018):139,
https://hdl.handle.net/21.15107/rcub_technorep_5256 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Hohenwarter, Anton
AU  - Pippan, Reinhard
AU  - Kojić, Vesna
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3963
AB  - The purpose of this study was to estimate the electrochemical behavior and biocompatibility of ultrafine-grained (UFG) commercially pure titanium (CPTi) and Ti-13Nb-13Zr (TNZ) alloy obtained by high-pressure torsion process. Electrochemical behavior of materials in artificial saliva at 37 degrees C was evaluated by potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS), and the obtained results indicated that UFG TNZ alloy showed corrosion current density (j(corr)=53 +/- 5 nA cm(-2)) which was 2 times lower compared to coarse-grained (CG) TNZ alloy (j(corr)=110 +/- 12 nA cm(-2)) and higher corrosion resistance, while UFG CPTi and CPTi showed approximately the same corrosion rate (mean j(corr) approximate to 38-40 nA cm(-2)). Static immersion test in artificial saliva, performed in this study, showed that the released ion concentrations from UFG materials were more than 10 times lower than the permitted concentration (the highest released Ti ion concentration from UFG CPTi and UFG TNZ alloy was 1.12 and 1.28 ppb, respectively, while permitted concentration was 15.5 ppb). The in vitro cytotoxicity tests, as the initial phase of the biocompatibility evaluation, showed that the fraction of surviving cells in all examined materials was much higher compared to the control sample and hence demonstrated absence of cytotoxicity and an increase of fibroblast cells adhesion on UFG materials surfaces. UFG CPTi and UFG TNZ alloy can be considered as promising materials for applications in dentistry due to high corrosion resistance and outstanding biocompatibility which were shown in this study.
PB  - Wiley, Hoboken
T2  - Journal of Biomedical Materials Research Part B-Applied Biomaterials
T1  - Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy
EP  - 1107
IS  - 3
SP  - 1097
VL  - 106
DO  - 10.1002/jbm.b.33919
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Hohenwarter, Anton and Pippan, Reinhard and Kojić, Vesna and Bajat, Jelena and Rakin, Marko",
year = "2018",
abstract = "The purpose of this study was to estimate the electrochemical behavior and biocompatibility of ultrafine-grained (UFG) commercially pure titanium (CPTi) and Ti-13Nb-13Zr (TNZ) alloy obtained by high-pressure torsion process. Electrochemical behavior of materials in artificial saliva at 37 degrees C was evaluated by potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS), and the obtained results indicated that UFG TNZ alloy showed corrosion current density (j(corr)=53 +/- 5 nA cm(-2)) which was 2 times lower compared to coarse-grained (CG) TNZ alloy (j(corr)=110 +/- 12 nA cm(-2)) and higher corrosion resistance, while UFG CPTi and CPTi showed approximately the same corrosion rate (mean j(corr) approximate to 38-40 nA cm(-2)). Static immersion test in artificial saliva, performed in this study, showed that the released ion concentrations from UFG materials were more than 10 times lower than the permitted concentration (the highest released Ti ion concentration from UFG CPTi and UFG TNZ alloy was 1.12 and 1.28 ppb, respectively, while permitted concentration was 15.5 ppb). The in vitro cytotoxicity tests, as the initial phase of the biocompatibility evaluation, showed that the fraction of surviving cells in all examined materials was much higher compared to the control sample and hence demonstrated absence of cytotoxicity and an increase of fibroblast cells adhesion on UFG materials surfaces. UFG CPTi and UFG TNZ alloy can be considered as promising materials for applications in dentistry due to high corrosion resistance and outstanding biocompatibility which were shown in this study.",
publisher = "Wiley, Hoboken",
journal = "Journal of Biomedical Materials Research Part B-Applied Biomaterials",
title = "Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy",
pages = "1107-1097",
number = "3",
volume = "106",
doi = "10.1002/jbm.b.33919"
}

Dimić, I., Cvijović-Alagić, I., Hohenwarter, A., Pippan, R., Kojić, V., Bajat, J.,& Rakin, M.. (2018). Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy. in Journal of Biomedical Materials Research Part B-Applied Biomaterials
Wiley, Hoboken., 106(3), 1097-1107.
https://doi.org/10.1002/jbm.b.33919

Dimić I, Cvijović-Alagić I, Hohenwarter A, Pippan R, Kojić V, Bajat J, Rakin M. Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy. in Journal of Biomedical Materials Research Part B-Applied Biomaterials. 2018;106(3):1097-1107.
doi:10.1002/jbm.b.33919 .

Dimić, Ivana, Cvijović-Alagić, Ivana, Hohenwarter, Anton, Pippan, Reinhard, Kojić, Vesna, Bajat, Jelena, Rakin, Marko, "Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy" in Journal of Biomedical Materials Research Part B-Applied Biomaterials, 106, no. 3 (2018):1097-1107,
https://doi.org/10.1002/jbm.b.33919 . .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Bajat, Jelena
AU  - Cvijović-Alagić, Ivana
AU  - Dimić, Ivana
AU  - Hohenwarter, Anton
AU  - Đokić, Veljko
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3785
AB  - In order to optimize and enhance the implant material properties, metallic materials may be modified by severe plastic deformation (SPD) procedures. One of the most attracting SPD methods is high-pressure torsion (HPT), which is method where deformation is obtained mainly by simple shear. In the present study ultrafine-grained titanium (UFG cpTi) and ultrafine-grained Ti-13Nb-13Zr (UFG TNZ) alloy were obtained by high pressure torsion (HPT) under a pressure of 4.1 GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. In order to analyse microstructure of materials before and after HPT process, scanning electron microscope (SEM) was used. The aim of this study was to determine the corrosion resistance of titanium and its alloy after HPT process. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37 degrees C, in order to simulate the oral environment. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance, but results indicate that HPT process can improves corrosion resistance.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity
T1  - The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion
EP  - 1839
SP  - 1834
VL  - 13
DO  - 10.1016/j.prostr.2018.12.332
ER  - 

@conference{
author = "Barjaktarević, Dragana and Bajat, Jelena and Cvijović-Alagić, Ivana and Dimić, Ivana and Hohenwarter, Anton and Đokić, Veljko and Rakin, Marko",
year = "2018",
abstract = "In order to optimize and enhance the implant material properties, metallic materials may be modified by severe plastic deformation (SPD) procedures. One of the most attracting SPD methods is high-pressure torsion (HPT), which is method where deformation is obtained mainly by simple shear. In the present study ultrafine-grained titanium (UFG cpTi) and ultrafine-grained Ti-13Nb-13Zr (UFG TNZ) alloy were obtained by high pressure torsion (HPT) under a pressure of 4.1 GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. In order to analyse microstructure of materials before and after HPT process, scanning electron microscope (SEM) was used. The aim of this study was to determine the corrosion resistance of titanium and its alloy after HPT process. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37 degrees C, in order to simulate the oral environment. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance, but results indicate that HPT process can improves corrosion resistance.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity",
title = "The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion",
pages = "1839-1834",
volume = "13",
doi = "10.1016/j.prostr.2018.12.332"
}

Barjaktarević, D., Bajat, J., Cvijović-Alagić, I., Dimić, I., Hohenwarter, A., Đokić, V.,& Rakin, M.. (2018). The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Procedia Structural Integrity
Elsevier Science Bv, Amsterdam., 13, 1834-1839.
https://doi.org/10.1016/j.prostr.2018.12.332

Barjaktarević D, Bajat J, Cvijović-Alagić I, Dimić I, Hohenwarter A, Đokić V, Rakin M. The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Procedia Structural Integrity. 2018;13:1834-1839.
doi:10.1016/j.prostr.2018.12.332 .

Barjaktarević, Dragana, Bajat, Jelena, Cvijović-Alagić, Ivana, Dimić, Ivana, Hohenwarter, Anton, Đokić, Veljko, Rakin, Marko, "The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion" in Procedia Structural Integrity, 13 (2018):1834-1839,
https://doi.org/10.1016/j.prostr.2018.12.332 . .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Đokić, Veljko
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3801
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructu
T1  - Morphology of Nanotubular Oxide Layer Formation on Titanium and Titanium Alloy Using Electrochemical Anodization
EP  - 162
SP  - 160
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8736
ER  - 

@conference{
author = "Barjaktarević, Dragana and Dimić, Ivana and Cvijović-Alagić, Ivana and Đokić, Veljko and Rakin, Marko",
year = "2018",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructu",
title = "Morphology of Nanotubular Oxide Layer Formation on Titanium and Titanium Alloy Using Electrochemical Anodization",
pages = "162-160",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8736"
}

Barjaktarević, D., Dimić, I., Cvijović-Alagić, I., Đokić, V.,& Rakin, M.. (2018). Morphology of Nanotubular Oxide Layer Formation on Titanium and Titanium Alloy Using Electrochemical Anodization. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructu
Belgrade : Serbian Academy of Sciences and Arts., 160-162.
https://hdl.handle.net/21.15107/rcub_vinar_8736

Barjaktarević D, Dimić I, Cvijović-Alagić I, Đokić V, Rakin M. Morphology of Nanotubular Oxide Layer Formation on Titanium and Titanium Alloy Using Electrochemical Anodization. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructu. 2018;:160-162.
https://hdl.handle.net/21.15107/rcub_vinar_8736 .

Barjaktarević, Dragana, Dimić, Ivana, Cvijović-Alagić, Ivana, Đokić, Veljko, Rakin, Marko, "Morphology of Nanotubular Oxide Layer Formation on Titanium and Titanium Alloy Using Electrochemical Anodization" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructu (2018):160-162,
https://hdl.handle.net/21.15107/rcub_vinar_8736 .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Đokić, Veljko
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5254
AB  - The good corrosion resistance is crucial for implant biomaterials application, because the metallic ion release from the implant to the surrounding tissue may give rise to biocompatibility problems. In order to optimize and enhance the implant material properties, the implant surfaces can be modified by different chemical surface treatments, including electrochemical anodic oxidation. In the present study nanotubular oxide layer on the surface of ultrafine-grained titanium (UFG cpTi), Ti-13Nb-13Zr (UFG TNZ) alloy and coarse-grained Ti-13Nb-13Zr (CG TNZ) alloy was formed using electrochemical anodization in 1M H3PO4 + 0.5 wt % NaF electrolyte, at room temperature during 60 minutes for UFG cpTi and 90 minutes for investigated alloys. The nanotubes morphology was studied using scanning electron microscopy (SEM). The SEM images showed that anodization of titanium and its alloy in a fluoride-containing electrolyte can lead to the formation of a highly regular self-organized nanotubular layer. Furthermore, nanotubes formed on UFG TNZ alloy were more uniformly arranged compared to nanotubes on CG TNZ alloy surface. The aim of this study was to determine the electrochemical behavior of titanium and its alloy after electrochemical anodization. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37°C, in order to simulate the oral environment and examine the above-mentioned materials for dental application. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance. The newly-formed inner barrier and outer porous surface layers were found to be highly resistant with capacitive behavior, but the materials with nanotubular oxide layer on their surface showed improved corrosion resistance.
PB  - Materials Research Society of Srebia
C3  - Materials Research Society of Srebia
T1  - Corrosion behavior of nanotubular oxide layer formed on titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion
SP  - 101
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5254
ER  - 

@conference{
author = "Barjaktarević, Dragana and Dimić, Ivana and Cvijović-Alagić, Ivana and Đokić, Veljko and Bajat, Jelena and Rakin, Marko",
year = "2017",
abstract = "The good corrosion resistance is crucial for implant biomaterials application, because the metallic ion release from the implant to the surrounding tissue may give rise to biocompatibility problems. In order to optimize and enhance the implant material properties, the implant surfaces can be modified by different chemical surface treatments, including electrochemical anodic oxidation. In the present study nanotubular oxide layer on the surface of ultrafine-grained titanium (UFG cpTi), Ti-13Nb-13Zr (UFG TNZ) alloy and coarse-grained Ti-13Nb-13Zr (CG TNZ) alloy was formed using electrochemical anodization in 1M H3PO4 + 0.5 wt % NaF electrolyte, at room temperature during 60 minutes for UFG cpTi and 90 minutes for investigated alloys. The nanotubes morphology was studied using scanning electron microscopy (SEM). The SEM images showed that anodization of titanium and its alloy in a fluoride-containing electrolyte can lead to the formation of a highly regular self-organized nanotubular layer. Furthermore, nanotubes formed on UFG TNZ alloy were more uniformly arranged compared to nanotubes on CG TNZ alloy surface. The aim of this study was to determine the electrochemical behavior of titanium and its alloy after electrochemical anodization. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37°C, in order to simulate the oral environment and examine the above-mentioned materials for dental application. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance. The newly-formed inner barrier and outer porous surface layers were found to be highly resistant with capacitive behavior, but the materials with nanotubular oxide layer on their surface showed improved corrosion resistance.",
publisher = "Materials Research Society of Srebia",
journal = "Materials Research Society of Srebia",
title = "Corrosion behavior of nanotubular oxide layer formed on titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion",
pages = "101",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5254"
}

Barjaktarević, D., Dimić, I., Cvijović-Alagić, I., Đokić, V., Bajat, J.,& Rakin, M.. (2017). Corrosion behavior of nanotubular oxide layer formed on titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Materials Research Society of Srebia
Materials Research Society of Srebia., 101.
https://hdl.handle.net/21.15107/rcub_technorep_5254

Barjaktarević D, Dimić I, Cvijović-Alagić I, Đokić V, Bajat J, Rakin M. Corrosion behavior of nanotubular oxide layer formed on titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Materials Research Society of Srebia. 2017;:101.
https://hdl.handle.net/21.15107/rcub_technorep_5254 .

Barjaktarević, Dragana, Dimić, Ivana, Cvijović-Alagić, Ivana, Đokić, Veljko, Bajat, Jelena, Rakin, Marko, "Corrosion behavior of nanotubular oxide layer formed on titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion" in Materials Research Society of Srebia (2017):101,
https://hdl.handle.net/21.15107/rcub_technorep_5254 .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Đokić, Veljko
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6196
AB  - U radu su ispitivane legure titana Ti-13Nb-13Zr (u polaznom stanju, CG, i nakon HPT obrade, eng.
high pressure torsion, UFG), kao potencijalnih biomaterijala. Legure su modifikovane formiranjem
nanotubularnih oksidnih slojeva u rastvoru 1M H3PO4 + 0.5 wt% NaF, na sobnoj temperaturi tokom
različitog vremena anodizacije. Cilj rada je određivanje uticaja modifikacije površine Ti legura na
korozionu stabilnost, ispitivanu u simuliranoj telesnoj tečnosti. Ipitivanja su vršena standardnim
elektrohemijskim metodama.
Morfologija modifikovanih površina Ti legura je analizirana skenirajućom elektronskom
mikroskopijom i pokazano je da se anodizacijom dobijaju visoko orijentisani slojevi nanotuba, sa
najravnomernijom raspodelom nanotuba na UFG TNZ leguri. Na osnovu polarizacionih krivih
pokazane su manje gustine struje korozije na anodiziranim uzorcima, koje pored postojanja dve
pseudo-pasivacione oblasti, ukazuju na njihovu veću korozionu stabilnost. Povoljan uticaj procesa
anodizacije je potvrđen i EIS merenjima.
PB  - Srpsko hemijsko društvo / Serbian Chemical Society
C3  - Fifth Conference of Young Chemists of Serbia Society
T1  - Electrochemical behavior of anodic Ti-13Nb-13Zr oxide nanotubes in simulated body fluid
SP  - 101
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6196
ER  - 

@conference{
author = "Barjaktarević, Dragana and Dimić, Ivana and Cvijović-Alagić, Ivana and Đokić, Veljko and Bajat, Jelena and Rakin, Marko",
year = "2017",
abstract = "U radu su ispitivane legure titana Ti-13Nb-13Zr (u polaznom stanju, CG, i nakon HPT obrade, eng.
high pressure torsion, UFG), kao potencijalnih biomaterijala. Legure su modifikovane formiranjem
nanotubularnih oksidnih slojeva u rastvoru 1M H3PO4 + 0.5 wt% NaF, na sobnoj temperaturi tokom
različitog vremena anodizacije. Cilj rada je određivanje uticaja modifikacije površine Ti legura na
korozionu stabilnost, ispitivanu u simuliranoj telesnoj tečnosti. Ipitivanja su vršena standardnim
elektrohemijskim metodama.
Morfologija modifikovanih površina Ti legura je analizirana skenirajućom elektronskom
mikroskopijom i pokazano je da se anodizacijom dobijaju visoko orijentisani slojevi nanotuba, sa
najravnomernijom raspodelom nanotuba na UFG TNZ leguri. Na osnovu polarizacionih krivih
pokazane su manje gustine struje korozije na anodiziranim uzorcima, koje pored postojanja dve
pseudo-pasivacione oblasti, ukazuju na njihovu veću korozionu stabilnost. Povoljan uticaj procesa
anodizacije je potvrđen i EIS merenjima.",
publisher = "Srpsko hemijsko društvo / Serbian Chemical Society",
journal = "Fifth Conference of Young Chemists of Serbia Society",
title = "Electrochemical behavior of anodic Ti-13Nb-13Zr oxide nanotubes in simulated body fluid",
pages = "101",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6196"
}

Barjaktarević, D., Dimić, I., Cvijović-Alagić, I., Đokić, V., Bajat, J.,& Rakin, M.. (2017). Electrochemical behavior of anodic Ti-13Nb-13Zr oxide nanotubes in simulated body fluid. in Fifth Conference of Young Chemists of Serbia Society
Srpsko hemijsko društvo / Serbian Chemical Society., 101.
https://hdl.handle.net/21.15107/rcub_technorep_6196

Barjaktarević D, Dimić I, Cvijović-Alagić I, Đokić V, Bajat J, Rakin M. Electrochemical behavior of anodic Ti-13Nb-13Zr oxide nanotubes in simulated body fluid. in Fifth Conference of Young Chemists of Serbia Society. 2017;:101.
https://hdl.handle.net/21.15107/rcub_technorep_6196 .

Barjaktarević, Dragana, Dimić, Ivana, Cvijović-Alagić, Ivana, Đokić, Veljko, Bajat, Jelena, Rakin, Marko, "Electrochemical behavior of anodic Ti-13Nb-13Zr oxide nanotubes in simulated body fluid" in Fifth Conference of Young Chemists of Serbia Society (2017):101,
https://hdl.handle.net/21.15107/rcub_technorep_6196 .

TY  - JOUR
AU  - Barjaktarević, Dragana
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Veljović, Đorđe
AU  - Rakin, Marko
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3616
AB  - The enhancement of commercially pure titanium (cpTi) mechanical properties, which is required for its medical application, can be achieved by grain refinement obtained by severe plastic deformation. In addition to mechanical properties improvement, excellent corrosion resistance of ultrafine-grained (UFG) cpTi in contact with human body fluids is required. Therefore, the aim of this study was to estimate electrochemical behavior of UFG cpTi obtained by high pressure torsion (HPT) under a pressure of 7,8 GPa at room temperature and up to 5 rotations. Electrochemical measurements were performed in artificial saliva at 37 degrees C in order to simulate oral environment, since development of UFG cpTi is primarily aimed for dental implant applications. Electrochemical behavior of UFG cpTi was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The obtained results indicate that HPT process, through significant grain size reduction, increases corrosion resistance of cpTi.
PB  - University of Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki vjesnik-Technical Gazette
T1  - Corrosion resistance of high pressure torsion obtained commercially pure titanium in acidic solution
EP  - 1695
IS  - 6
SP  - 1689
VL  - 24
DO  - 10.17559/TV-20160303141534
ER  - 

@article{
author = "Barjaktarević, Dragana and Dimić, Ivana and Cvijović-Alagić, Ivana and Veljović, Đorđe and Rakin, Marko",
year = "2017",
abstract = "The enhancement of commercially pure titanium (cpTi) mechanical properties, which is required for its medical application, can be achieved by grain refinement obtained by severe plastic deformation. In addition to mechanical properties improvement, excellent corrosion resistance of ultrafine-grained (UFG) cpTi in contact with human body fluids is required. Therefore, the aim of this study was to estimate electrochemical behavior of UFG cpTi obtained by high pressure torsion (HPT) under a pressure of 7,8 GPa at room temperature and up to 5 rotations. Electrochemical measurements were performed in artificial saliva at 37 degrees C in order to simulate oral environment, since development of UFG cpTi is primarily aimed for dental implant applications. Electrochemical behavior of UFG cpTi was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The obtained results indicate that HPT process, through significant grain size reduction, increases corrosion resistance of cpTi.",
publisher = "University of Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki vjesnik-Technical Gazette",
title = "Corrosion resistance of high pressure torsion obtained commercially pure titanium in acidic solution",
pages = "1695-1689",
number = "6",
volume = "24",
doi = "10.17559/TV-20160303141534"
}

Barjaktarević, D., Dimić, I., Cvijović-Alagić, I., Veljović, Đ.,& Rakin, M.. (2017). Corrosion resistance of high pressure torsion obtained commercially pure titanium in acidic solution. in Tehnicki vjesnik-Technical Gazette
University of Osijek, Tech Fac, Slavonski Brod., 24(6), 1689-1695.
https://doi.org/10.17559/TV-20160303141534

Barjaktarević D, Dimić I, Cvijović-Alagić I, Veljović Đ, Rakin M. Corrosion resistance of high pressure torsion obtained commercially pure titanium in acidic solution. in Tehnicki vjesnik-Technical Gazette. 2017;24(6):1689-1695.
doi:10.17559/TV-20160303141534 .

Barjaktarević, Dragana, Dimić, Ivana, Cvijović-Alagić, Ivana, Veljović, Đorđe, Rakin, Marko, "Corrosion resistance of high pressure torsion obtained commercially pure titanium in acidic solution" in Tehnicki vjesnik-Technical Gazette, 24, no. 6 (2017):1689-1695,
https://doi.org/10.17559/TV-20160303141534 . .

TY  - JOUR
AU  - Barjaktarević, Dragana
AU  - Cvijović-Alagić, Ivana
AU  - Dimić, Ivana
AU  - Đokić, Veljko
AU  - Rakin, Marko
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3197
AB  - Commercially pure titanium (cpTi) and titanium alloys are the most commonly used metallic biomaterials. Biomedical requirements for the successful usage of metallic implant materials include their high mechanical strength, low elastic modulus, excellent biocompatibility and high corrosion resistance. It is evident that the response of a biomaterial implanted into the human body depends entirely on its biocompatibility and surface properties. Therefore, in order to improve the performance of biomaterials in biological systems modification of their surface is necessary. One of most commonly used method of implant materials surface modification is electrochemical anodization and this method is reviewed in the present work. Aim of the presented review article is to explain the electrochemical anodization process and the way in which the nanotubes are formed by anodization on the metallic material surface. Influence of anodizing parameters on the nanotubes characteristics, such as nanotube diameter, length and nanotubular layer thickness, are described, as well as the anodized nanotubes influence on the material surface properties, corrosion resistance and biocompatibility.
PB  - Association of Metallurgical Engineers of Serbia
T2  - Metallurgical & Materials Engineering
T1  - Anodization of Ti-based materials for biomedical applications: A review
EP  - 143
IS  - 3
SP  - 121
VL  - 22
UR  - https://hdl.handle.net/21.15107/rcub_vinar_1709
ER  - 

@article{
author = "Barjaktarević, Dragana and Cvijović-Alagić, Ivana and Dimić, Ivana and Đokić, Veljko and Rakin, Marko",
year = "2016",
abstract = "Commercially pure titanium (cpTi) and titanium alloys are the most commonly used metallic biomaterials. Biomedical requirements for the successful usage of metallic implant materials include their high mechanical strength, low elastic modulus, excellent biocompatibility and high corrosion resistance. It is evident that the response of a biomaterial implanted into the human body depends entirely on its biocompatibility and surface properties. Therefore, in order to improve the performance of biomaterials in biological systems modification of their surface is necessary. One of most commonly used method of implant materials surface modification is electrochemical anodization and this method is reviewed in the present work. Aim of the presented review article is to explain the electrochemical anodization process and the way in which the nanotubes are formed by anodization on the metallic material surface. Influence of anodizing parameters on the nanotubes characteristics, such as nanotube diameter, length and nanotubular layer thickness, are described, as well as the anodized nanotubes influence on the material surface properties, corrosion resistance and biocompatibility.",
publisher = "Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering",
title = "Anodization of Ti-based materials for biomedical applications: A review",
pages = "143-121",
number = "3",
volume = "22",
url = "https://hdl.handle.net/21.15107/rcub_vinar_1709"
}

Barjaktarević, D., Cvijović-Alagić, I., Dimić, I., Đokić, V.,& Rakin, M.. (2016). Anodization of Ti-based materials for biomedical applications: A review. in Metallurgical & Materials Engineering
Association of Metallurgical Engineers of Serbia., 22(3), 121-143.
https://hdl.handle.net/21.15107/rcub_vinar_1709

Barjaktarević D, Cvijović-Alagić I, Dimić I, Đokić V, Rakin M. Anodization of Ti-based materials for biomedical applications: A review. in Metallurgical & Materials Engineering. 2016;22(3):121-143.
https://hdl.handle.net/21.15107/rcub_vinar_1709 .

Barjaktarević, Dragana, Cvijović-Alagić, Ivana, Dimić, Ivana, Đokić, Veljko, Rakin, Marko, "Anodization of Ti-based materials for biomedical applications: A review" in Metallurgical & Materials Engineering, 22, no. 3 (2016):121-143,
https://hdl.handle.net/21.15107/rcub_vinar_1709 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Voelker, Bernhard
AU  - Hohenwarter, Anton
AU  - Pippan, Reinhard
AU  - Veljović, Đorđe
AU  - Rakin, Marko
AU  - Bugarski, Branko
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3446
AB  - Significant enhancement of mechanical properties of metallic biomaterials can be achieved by grain refinement obtained by severe plastic deformation. The purpose of this study was to determine metallic ion release from commercially pure titanium (CPTi) and Ti-13Nb-13Zr alloy processed by high pressure torsion (HPT). The materials microstructures, in the initial state and after HPT deformation, were examined by scanning and transmission electron microscopy. The microhardness was determined along the radius of the disc-shaped samples of ultrafine-grained (UFG) CPTi and Ti-13Nb-13Zr alloy in order to evaluate homogeneity of HPT-processed materials. The quantities of released ions were determined using inductively coupled plasma-mass spectrophotometer for samples immersed in artificial saliva at 37 degrees C for 7 days. Also, the effect of artificial saliva pH value on metallic ion release was estimated. Obtained results revealed that the quantities of released ions from UFG CPTi and Ti-13Nb-13Zr alloy obtained by HPT process were higher than the quantities of released ions from CPTi and Ti-13Nb-13Zr alloy produced by traditional casting. This behavior can be explained by the fact that metallic ions are easily released from microstructure with smaller grains achieved by HPT process.
PB  - Elsevier Sci Ltd, Oxford
T2  - Materials & Design
T1  - Microstructure and metallic ion release of pure titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion
EP  - 347
SP  - 340
VL  - 91
DO  - 10.1016/j.matdes.2015.11.088
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Voelker, Bernhard and Hohenwarter, Anton and Pippan, Reinhard and Veljović, Đorđe and Rakin, Marko and Bugarski, Branko",
year = "2016",
abstract = "Significant enhancement of mechanical properties of metallic biomaterials can be achieved by grain refinement obtained by severe plastic deformation. The purpose of this study was to determine metallic ion release from commercially pure titanium (CPTi) and Ti-13Nb-13Zr alloy processed by high pressure torsion (HPT). The materials microstructures, in the initial state and after HPT deformation, were examined by scanning and transmission electron microscopy. The microhardness was determined along the radius of the disc-shaped samples of ultrafine-grained (UFG) CPTi and Ti-13Nb-13Zr alloy in order to evaluate homogeneity of HPT-processed materials. The quantities of released ions were determined using inductively coupled plasma-mass spectrophotometer for samples immersed in artificial saliva at 37 degrees C for 7 days. Also, the effect of artificial saliva pH value on metallic ion release was estimated. Obtained results revealed that the quantities of released ions from UFG CPTi and Ti-13Nb-13Zr alloy obtained by HPT process were higher than the quantities of released ions from CPTi and Ti-13Nb-13Zr alloy produced by traditional casting. This behavior can be explained by the fact that metallic ions are easily released from microstructure with smaller grains achieved by HPT process.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Materials & Design",
title = "Microstructure and metallic ion release of pure titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion",
pages = "347-340",
volume = "91",
doi = "10.1016/j.matdes.2015.11.088"
}

Dimić, I., Cvijović-Alagić, I., Voelker, B., Hohenwarter, A., Pippan, R., Veljović, Đ., Rakin, M.,& Bugarski, B.. (2016). Microstructure and metallic ion release of pure titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Materials & Design
Elsevier Sci Ltd, Oxford., 91, 340-347.
https://doi.org/10.1016/j.matdes.2015.11.088

Dimić I, Cvijović-Alagić I, Voelker B, Hohenwarter A, Pippan R, Veljović Đ, Rakin M, Bugarski B. Microstructure and metallic ion release of pure titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Materials & Design. 2016;91:340-347.
doi:10.1016/j.matdes.2015.11.088 .

Dimić, Ivana, Cvijović-Alagić, Ivana, Voelker, Bernhard, Hohenwarter, Anton, Pippan, Reinhard, Veljović, Đorđe, Rakin, Marko, Bugarski, Branko, "Microstructure and metallic ion release of pure titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion" in Materials & Design, 91 (2016):340-347,
https://doi.org/10.1016/j.matdes.2015.11.088 . .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Obradović, Nataša
AU  - Petrović, Jelena
AU  - Putić, Slaviša
AU  - Rakin, Marko
AU  - Bugarski, Branko
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3087
AB  - Metallic materials, such as Co-Cr-Mo alloys, are exposed to aggressive conditions in the oral cavity that represents an ideal environment for metallic ion release and biodegradation. The metallic ions released from dental materials can cause local and/or systemic adverse effects in the human body. Therefore, dental materials are required to possess appropriate mechanical, physical, chemical and biological properties. The biocompatibility of metallic materials is very important for dental applications. Accordingly, the aim of this study was to examine metallic ion release and cytotoxicity of Co-30Cr-5Mo cast alloy as the initial phase of biocompatibility evaluation. Determination of the viability of human (MRC-5) and animal (L929) fibroblast cells were conducted using three in vitro test methods: the colorimetric methyl-thiazol-tetrazolium (MTT) test, the dye exclusion test (DET) and the agar diffusion test (ADT). Furthermore, the morphology and growth of the cells were analyzed using scanning electron microscopy (SEM). The obtained results indicated that Co-30Cr-5Mo alloy did not release harmful elements in concentrations high enough to have detrimental effects on human and animal fibroblasts under the given experimental conditions. Moreover, the fibroblast cells showed good adhesion on the surface of the Co-30Cr-5Mo alloy. Therefore, it could be concluded that Co-30Cr-5Mo alloy is a biocompatible material that could be safely used in dentistry.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy
EP  - 1552
IS  - 12
SP  - 1541
VL  - 80
DO  - 10.2298/JSC150505070M
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Obradović, Nataša and Petrović, Jelena and Putić, Slaviša and Rakin, Marko and Bugarski, Branko",
year = "2015",
abstract = "Metallic materials, such as Co-Cr-Mo alloys, are exposed to aggressive conditions in the oral cavity that represents an ideal environment for metallic ion release and biodegradation. The metallic ions released from dental materials can cause local and/or systemic adverse effects in the human body. Therefore, dental materials are required to possess appropriate mechanical, physical, chemical and biological properties. The biocompatibility of metallic materials is very important for dental applications. Accordingly, the aim of this study was to examine metallic ion release and cytotoxicity of Co-30Cr-5Mo cast alloy as the initial phase of biocompatibility evaluation. Determination of the viability of human (MRC-5) and animal (L929) fibroblast cells were conducted using three in vitro test methods: the colorimetric methyl-thiazol-tetrazolium (MTT) test, the dye exclusion test (DET) and the agar diffusion test (ADT). Furthermore, the morphology and growth of the cells were analyzed using scanning electron microscopy (SEM). The obtained results indicated that Co-30Cr-5Mo alloy did not release harmful elements in concentrations high enough to have detrimental effects on human and animal fibroblasts under the given experimental conditions. Moreover, the fibroblast cells showed good adhesion on the surface of the Co-30Cr-5Mo alloy. Therefore, it could be concluded that Co-30Cr-5Mo alloy is a biocompatible material that could be safely used in dentistry.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy",
pages = "1552-1541",
number = "12",
volume = "80",
doi = "10.2298/JSC150505070M"
}

Dimić, I., Cvijović-Alagić, I., Obradović, N., Petrović, J., Putić, S., Rakin, M.,& Bugarski, B.. (2015). In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(12), 1541-1552.
https://doi.org/10.2298/JSC150505070M

Dimić I, Cvijović-Alagić I, Obradović N, Petrović J, Putić S, Rakin M, Bugarski B. In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy. in Journal of the Serbian Chemical Society. 2015;80(12):1541-1552.
doi:10.2298/JSC150505070M .

Dimić, Ivana, Cvijović-Alagić, Ivana, Obradović, Nataša, Petrović, Jelena, Putić, Slaviša, Rakin, Marko, Bugarski, Branko, "In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy" in Journal of the Serbian Chemical Society, 80, no. 12 (2015):1541-1552,
https://doi.org/10.2298/JSC150505070M . .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5249
AB  - The enhancement of mechanical properties of commercially pure titanium (cpTi) can be achieved by grain refinement obtained by severe plastic deformation, but corrosion resistance of ultrafinegrained (UFG) cpTi is still under discussion. Therefore, the aim of this study was to estimate electrochemical behavior of UFG cpTi obtained by high pressure torsion under a pressure of 7.8GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. Electrochemical measurements were performed in artificial saliva with pH value of 4.0 at 37°C in order to simulate oral environment, because UFG cpTi is primarily developing for dental implant applications. UFG cpTi was investigated by electrochemical impedance spectroscopy (EIS). The obtained results indicate that HPT process significantly reduces the grain size and UFG cpTi shows better corrosion resistance compared to its coarse-grained (CG) counterpart.
PB  - Univerzitet u Beogradu, Mašinski fakultet
C3  - Proceedings of TEAM 2015
T1  - The electrochemical impedance spectroscopy study of ultrafine-grained titanium in artificial saliva
EP  - 339
SP  - 336
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5249
ER  - 

@conference{
author = "Barjaktarević, Dragana and Dimić, Ivana and Cvijović-Alagić, Ivana and Bajat, Jelena and Rakin, Marko",
year = "2015",
abstract = "The enhancement of mechanical properties of commercially pure titanium (cpTi) can be achieved by grain refinement obtained by severe plastic deformation, but corrosion resistance of ultrafinegrained (UFG) cpTi is still under discussion. Therefore, the aim of this study was to estimate electrochemical behavior of UFG cpTi obtained by high pressure torsion under a pressure of 7.8GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. Electrochemical measurements were performed in artificial saliva with pH value of 4.0 at 37°C in order to simulate oral environment, because UFG cpTi is primarily developing for dental implant applications. UFG cpTi was investigated by electrochemical impedance spectroscopy (EIS). The obtained results indicate that HPT process significantly reduces the grain size and UFG cpTi shows better corrosion resistance compared to its coarse-grained (CG) counterpart.",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
journal = "Proceedings of TEAM 2015",
title = "The electrochemical impedance spectroscopy study of ultrafine-grained titanium in artificial saliva",
pages = "339-336",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5249"
}

Barjaktarević, D., Dimić, I., Cvijović-Alagić, I., Bajat, J.,& Rakin, M.. (2015). The electrochemical impedance spectroscopy study of ultrafine-grained titanium in artificial saliva. in Proceedings of TEAM 2015
Univerzitet u Beogradu, Mašinski fakultet., 336-339.
https://hdl.handle.net/21.15107/rcub_technorep_5249

Barjaktarević D, Dimić I, Cvijović-Alagić I, Bajat J, Rakin M. The electrochemical impedance spectroscopy study of ultrafine-grained titanium in artificial saliva. in Proceedings of TEAM 2015. 2015;:336-339.
https://hdl.handle.net/21.15107/rcub_technorep_5249 .

Barjaktarević, Dragana, Dimić, Ivana, Cvijović-Alagić, Ivana, Bajat, Jelena, Rakin, Marko, "The electrochemical impedance spectroscopy study of ultrafine-grained titanium in artificial saliva" in Proceedings of TEAM 2015 (2015):336-339,
https://hdl.handle.net/21.15107/rcub_technorep_5249 .

TY  - CONF
AU  - Barjaktarević, Dragana
AU  - Dimić, Ivana
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6195
AB  - Komercijalno čist titan (cpTi) i njegove legure su najčešce korišceni metalni biomaterijali
za izradu zubnih implanata, proteza, šrafova i ploča za fiksiranje polomljenih kosti,
uređaja za veštačko srce, itd. CpTi i Ti-legure pokazuju dobru mehaničku čvrstoću, niski
modul elastičnosti, odličnu biokompatibilnost i otpornost na koroziju. Cilj ovog istraživa
nja je bio da se proceni elektrohemijsko ponašanje cpTi i savremene Ti-13Nb-13Zr (TNZ)
legure. Elektrohemijska merenja su izvedena u rastvoru veštačke pljuvačke pH vrednosti 4,0 na 370C u cilju simuliranja oralnog okruženja, jer je materijal prvenstveno razvijen za
stomatologiju tj. za primenu kod zubnih implanata. CpTi i TNZ legura su ispitivani
spektroskopijom elektrohemijske impedanse (SEI) i potenciodinamičkom polarizacijom.
Oba istraživana materijala su pokazala dobru otpornost na koroziju u navedenom
rastvoru. Dobijeni rezultati pokazuju da su unutrašnji barijerni i spoljašnji porozni sloj
velike otpornosti i kapacitivnosti, ali tanak i uniforman pasivni film koji se formira na
površini cpTi daje veću zaštitu.
PB  - Srpsko hemijsko društvo / Serbian Chemical Society
C3  - Third Conference of Young Chemists of Serbia
T1  - Koroziono ponašanje čistog titana i Ti-13Nb-13Zr legure  u rastvoru veštačke pljuvačke
SP  - 79
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6195
ER  - 

@conference{
author = "Barjaktarević, Dragana and Dimić, Ivana and Bajat, Jelena and Rakin, Marko",
year = "2015",
abstract = "Komercijalno čist titan (cpTi) i njegove legure su najčešce korišceni metalni biomaterijali
za izradu zubnih implanata, proteza, šrafova i ploča za fiksiranje polomljenih kosti,
uređaja za veštačko srce, itd. CpTi i Ti-legure pokazuju dobru mehaničku čvrstoću, niski
modul elastičnosti, odličnu biokompatibilnost i otpornost na koroziju. Cilj ovog istraživa
nja je bio da se proceni elektrohemijsko ponašanje cpTi i savremene Ti-13Nb-13Zr (TNZ)
legure. Elektrohemijska merenja su izvedena u rastvoru veštačke pljuvačke pH vrednosti 4,0 na 370C u cilju simuliranja oralnog okruženja, jer je materijal prvenstveno razvijen za
stomatologiju tj. za primenu kod zubnih implanata. CpTi i TNZ legura su ispitivani
spektroskopijom elektrohemijske impedanse (SEI) i potenciodinamičkom polarizacijom.
Oba istraživana materijala su pokazala dobru otpornost na koroziju u navedenom
rastvoru. Dobijeni rezultati pokazuju da su unutrašnji barijerni i spoljašnji porozni sloj
velike otpornosti i kapacitivnosti, ali tanak i uniforman pasivni film koji se formira na
površini cpTi daje veću zaštitu.",
publisher = "Srpsko hemijsko društvo / Serbian Chemical Society",
journal = "Third Conference of Young Chemists of Serbia",
title = "Koroziono ponašanje čistog titana i Ti-13Nb-13Zr legure  u rastvoru veštačke pljuvačke",
pages = "79",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6195"
}

Barjaktarević, D., Dimić, I., Bajat, J.,& Rakin, M.. (2015). Koroziono ponašanje čistog titana i Ti-13Nb-13Zr legure  u rastvoru veštačke pljuvačke. in Third Conference of Young Chemists of Serbia
Srpsko hemijsko društvo / Serbian Chemical Society., 79.
https://hdl.handle.net/21.15107/rcub_technorep_6195

Barjaktarević D, Dimić I, Bajat J, Rakin M. Koroziono ponašanje čistog titana i Ti-13Nb-13Zr legure  u rastvoru veštačke pljuvačke. in Third Conference of Young Chemists of Serbia. 2015;:79.
https://hdl.handle.net/21.15107/rcub_technorep_6195 .

Barjaktarević, Dragana, Dimić, Ivana, Bajat, Jelena, Rakin, Marko, "Koroziono ponašanje čistog titana i Ti-13Nb-13Zr legure  u rastvoru veštačke pljuvačke" in Third Conference of Young Chemists of Serbia (2015):79,
https://hdl.handle.net/21.15107/rcub_technorep_6195 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Kostić, Ivana T.
AU  - Perić-Grujić, Aleksandra
AU  - Rakin, Marko
AU  - Putić, Slaviša
AU  - Bugarski, Branko
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2625
AB  - Metallic biomaterials, which are mainly used for the damaged hard tissue replacements, are materials with high strength, excellent toughness and good wear resistance. The disadvantages of metals as implant materials are their susceptibility to corrosion, the elastic modulus mismatch between metals and human hard tissues, relatively high density and metallic ion release, which can cause serious health problems. The aim of this study was to examine metallic ion release from Co-Cr-Mo alloy in artificial saliva. In that purpose, alloy samples were immersed into artificial saliva with different pH values (4.0, 5.5 and 7.5). After a certain immersion period (1, 3 and 6 weeks) the concentrations of released ions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The research findings were used in order to define the dependence between the concentration of released metallic ions, artificial saliva pH values and immersion time. The determined released metallic ions concentrations were compared with literature data in order to describe and better understand the phenomenon of metallic ion release from the biocompatible cobalt-based alloy.
AB  - Metalni biomaterijali, koji se najčešće koriste za zamenu oštećenih čvrstih tkiva u organizmu čoveka, su materijali velike čvrstoće, žilavosti i otpornosti prema habanju. Nedostaci metala, kao implantnih materijala, su njihova podložnost koroziji, neusklađenost modula elastičnosti metala i čvrstih ljudskih tkiva, velika gustina i otpuštanje metalnih jona koje može da izazove ozbiljne zdravstvene probleme. Cilj ovog rada je bio da se ispita otpuštanje metalnih jona iz Co-Cr-Mo legure u rastvoru veštačke pljuvačke. Uzorci legure su potopljeni u rastvor veštačke pljuvačke različite pH vrednosti (4,0, 5,5 i 7,5). Nakon određenog vremena izlaganja legure veštačkoj pljuvačci (1, 3 i 6 nedelja) određene su koncentracije otpuštenih jona primenom indukcije spregnute plazme sa masenom spektrometrijom (ICP-MS). Dobijeni rezultati su iskorišćeni u cilju definisanja zavisnosti između koncentracije otpuštenih jona, pH vrednosti veštačke pljuvačke i dužine potapanja legure u rastvor veštačke pljuvačke. Osim toga, utvrđene koncentracije otpuštenih metalnih jona iz ispitivane legure su upoređene sa podacima dostupnim u literaturi u cilju što boljeg opisivanja i razumevanja fenomena otpuštanja metalnih jona iz biokompatibilne Co-Cr-Mo legure.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - Metallic ion release from biocompatible cobalt-based alloy
T1  - Otpuštanje metalnih jona iz biokompatibilne legure kobalta
EP  - 577
IS  - 4
SP  - 571
VL  - 20
DO  - 10.2298/CICEQ130813039D
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Kostić, Ivana T. and Perić-Grujić, Aleksandra and Rakin, Marko and Putić, Slaviša and Bugarski, Branko",
year = "2014",
abstract = "Metallic biomaterials, which are mainly used for the damaged hard tissue replacements, are materials with high strength, excellent toughness and good wear resistance. The disadvantages of metals as implant materials are their susceptibility to corrosion, the elastic modulus mismatch between metals and human hard tissues, relatively high density and metallic ion release, which can cause serious health problems. The aim of this study was to examine metallic ion release from Co-Cr-Mo alloy in artificial saliva. In that purpose, alloy samples were immersed into artificial saliva with different pH values (4.0, 5.5 and 7.5). After a certain immersion period (1, 3 and 6 weeks) the concentrations of released ions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The research findings were used in order to define the dependence between the concentration of released metallic ions, artificial saliva pH values and immersion time. The determined released metallic ions concentrations were compared with literature data in order to describe and better understand the phenomenon of metallic ion release from the biocompatible cobalt-based alloy., Metalni biomaterijali, koji se najčešće koriste za zamenu oštećenih čvrstih tkiva u organizmu čoveka, su materijali velike čvrstoće, žilavosti i otpornosti prema habanju. Nedostaci metala, kao implantnih materijala, su njihova podložnost koroziji, neusklađenost modula elastičnosti metala i čvrstih ljudskih tkiva, velika gustina i otpuštanje metalnih jona koje može da izazove ozbiljne zdravstvene probleme. Cilj ovog rada je bio da se ispita otpuštanje metalnih jona iz Co-Cr-Mo legure u rastvoru veštačke pljuvačke. Uzorci legure su potopljeni u rastvor veštačke pljuvačke različite pH vrednosti (4,0, 5,5 i 7,5). Nakon određenog vremena izlaganja legure veštačkoj pljuvačci (1, 3 i 6 nedelja) određene su koncentracije otpuštenih jona primenom indukcije spregnute plazme sa masenom spektrometrijom (ICP-MS). Dobijeni rezultati su iskorišćeni u cilju definisanja zavisnosti između koncentracije otpuštenih jona, pH vrednosti veštačke pljuvačke i dužine potapanja legure u rastvor veštačke pljuvačke. Osim toga, utvrđene koncentracije otpuštenih metalnih jona iz ispitivane legure su upoređene sa podacima dostupnim u literaturi u cilju što boljeg opisivanja i razumevanja fenomena otpuštanja metalnih jona iz biokompatibilne Co-Cr-Mo legure.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "Metallic ion release from biocompatible cobalt-based alloy, Otpuštanje metalnih jona iz biokompatibilne legure kobalta",
pages = "577-571",
number = "4",
volume = "20",
doi = "10.2298/CICEQ130813039D"
}

Dimić, I., Cvijović-Alagić, I., Kostić, I. T., Perić-Grujić, A., Rakin, M., Putić, S.,& Bugarski, B.. (2014). Metallic ion release from biocompatible cobalt-based alloy. in Chemical Industry & Chemical Engineering Quarterly
Association of the Chemical Engineers of Serbia., 20(4), 571-577.
https://doi.org/10.2298/CICEQ130813039D

Dimić I, Cvijović-Alagić I, Kostić IT, Perić-Grujić A, Rakin M, Putić S, Bugarski B. Metallic ion release from biocompatible cobalt-based alloy. in Chemical Industry & Chemical Engineering Quarterly. 2014;20(4):571-577.
doi:10.2298/CICEQ130813039D .

Dimić, Ivana, Cvijović-Alagić, Ivana, Kostić, Ivana T., Perić-Grujić, Aleksandra, Rakin, Marko, Putić, Slaviša, Bugarski, Branko, "Metallic ion release from biocompatible cobalt-based alloy" in Chemical Industry & Chemical Engineering Quarterly, 20, no. 4 (2014):571-577,
https://doi.org/10.2298/CICEQ130813039D . .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Međo, Bojan
AU  - Rakin, Marko
AU  - Arsić, Miodrag
AU  - Šarkočević, Živče
AU  - Sedmak, Aleksandar
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2803
AB  - Working conditions of casing pipes in drilling rigs can significantly influence the initiation and development of damage in the material, and therefore also the safe service of the entire system. In this work, an integrity assessment of a steel pipe with initial defect (machined surface crack) is presented. The position of this defect is on the external surface; unlike transport pipes, where internal surface is often endangered due to the contact with the fluid, casing pipes are often exposed to damages at the external surface. Analyzed crack is in axial direction, bearing in mind that this type of defect most significantly decreases the load carrying capacity of the cylindrical pressurized components. A pipe segment exposed to internal pressure is analyzed experimentally and numerically, using the finite element method. The experimental setup included the tracking of crack mouth opening displacement (CMOD) values, as well as J integral, which is determined by application of direct measurement. Criteria for pipe failure are determined on finite element models of the pipe; fracture initiation and plastic collapse are considered as failure mechanisms. The size of the crack is varied in the finite element models; several 3D models with different crack sizes (length and depth) are evaluated. Dependence of maximum internal pressure on the defect size is obtained. 2D plane strain models are also examined, with an aim to determine the applicability limits of this simplified approach. Based on the obtained results, integrity assessment criteria for the analyzed geometries are discussed.
PB  - Elsevier Science Bv, Amsterdam
T2  - 20th European Conference on Fracture
T1  - Failure prediction of gas and oil drilling rig pipelines with axial defects
EP  - 960
SP  - 955
VL  - 3
DO  - 10.1016/j.mspro.2014.06.155
ER  - 

@article{
author = "Dimić, Ivana and Međo, Bojan and Rakin, Marko and Arsić, Miodrag and Šarkočević, Živče and Sedmak, Aleksandar",
year = "2014",
abstract = "Working conditions of casing pipes in drilling rigs can significantly influence the initiation and development of damage in the material, and therefore also the safe service of the entire system. In this work, an integrity assessment of a steel pipe with initial defect (machined surface crack) is presented. The position of this defect is on the external surface; unlike transport pipes, where internal surface is often endangered due to the contact with the fluid, casing pipes are often exposed to damages at the external surface. Analyzed crack is in axial direction, bearing in mind that this type of defect most significantly decreases the load carrying capacity of the cylindrical pressurized components. A pipe segment exposed to internal pressure is analyzed experimentally and numerically, using the finite element method. The experimental setup included the tracking of crack mouth opening displacement (CMOD) values, as well as J integral, which is determined by application of direct measurement. Criteria for pipe failure are determined on finite element models of the pipe; fracture initiation and plastic collapse are considered as failure mechanisms. The size of the crack is varied in the finite element models; several 3D models with different crack sizes (length and depth) are evaluated. Dependence of maximum internal pressure on the defect size is obtained. 2D plane strain models are also examined, with an aim to determine the applicability limits of this simplified approach. Based on the obtained results, integrity assessment criteria for the analyzed geometries are discussed.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "20th European Conference on Fracture",
title = "Failure prediction of gas and oil drilling rig pipelines with axial defects",
pages = "960-955",
volume = "3",
doi = "10.1016/j.mspro.2014.06.155"
}

Dimić, I., Međo, B., Rakin, M., Arsić, M., Šarkočević, Ž.,& Sedmak, A.. (2014). Failure prediction of gas and oil drilling rig pipelines with axial defects. in 20th European Conference on Fracture
Elsevier Science Bv, Amsterdam., 3, 955-960.
https://doi.org/10.1016/j.mspro.2014.06.155

Dimić I, Međo B, Rakin M, Arsić M, Šarkočević Ž, Sedmak A. Failure prediction of gas and oil drilling rig pipelines with axial defects. in 20th European Conference on Fracture. 2014;3:955-960.
doi:10.1016/j.mspro.2014.06.155 .

Dimić, Ivana, Međo, Bojan, Rakin, Marko, Arsić, Miodrag, Šarkočević, Živče, Sedmak, Aleksandar, "Failure prediction of gas and oil drilling rig pipelines with axial defects" in 20th European Conference on Fracture, 3 (2014):955-960,
https://doi.org/10.1016/j.mspro.2014.06.155 . .

TY  - JOUR
AU  - Stamenović, Marina
AU  - Petrović, Jelena
AU  - Dimić, Ivana
AU  - Putić, Slaviša
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2354
AB  - The use of composite material increases. Composite materials are used in a wide range of applications such as automotive, aerospace and other industries. But they have not been properly recycled, due to their inherent nature of heterogeneity. The current and future waste management and environmental legislations in EU require all engineering materials to be properly recovered and recycled from end-of-life (EOL) products. Recycling will ultimately lead to resource and energy saving. This work presents different possibilities for recycling composite. Various technologies have been developed: mechanical recycling, thermal recycling, and chemical recycling, depending on the applied operations during the recycling process. Mechanical recycling techniques involve the use of grinding techniques to comminute the scrap material and produce recycled products in different size ranges suitable for reuse as fillers or partial reinforcement in new composite material. Thermal techniques involve the use of heat resulting in releasing certain amounts of energy. Chemical recycling involves the process for chemical depolymerisation or removal of the matrix by using chemical dissolution reagents for liberation of fibres which can be reused. The removed matrix can process a useful product using a specific chemical procedures. However a lack of adequate markets, high recycling cost, and lower quality of the recyclates are the major commercialization barriers.
AB  - Upotreba kompozitnih materijala je u stalnom porastu. Kompozitni materijali imaju široku primenu u različitim granama industrije, kao što su automobilska, avio industrija i druge. Međutim, oni se još uvek ne recikliraju adekvatno, najviše zbog njihove prirode, tj. heterogene strukture. Regulative koje se odnose na upravljanje otpadom i zaštitu životne sredine u Evropskoj Uniji propisuju da svi inženjerski materijali moraju biti reciklirani na kraju svog životnog veka, čime se postiže značajna ušteda energije. U ovom radu su prikazane različite mogućnosti reciklaže kompozitnih materijala. Postupci reciklaže mogu biti mehanički, toplotni i hemijski, u zavisnosti od primenjene operacije tokom procesa reciklaže. Mehanički postupci podrazumevaju korišćenje tehnika usitnjavanja kompozitnih materijala kako bi se dobili reciklati odgovarajućih dimenzija, nakon čega se isti mogu koristiti kao punioci ili kao ojačanja u novim kompozitnim materijalima. Termički postupci podrazumevaju korišćenje toplote tokom procesa reciklaže što rezultira oslobađanjem određene količine energije. U okviru hemijskih postupaka reciklaže primenjuje se proces depolimerizacije i uklanjanja matrice iz kompozita pomoću različitih reagenasa, čime se izdvajaju vlakna koja se mogu ponovo upotrebiti, a uklonjena matrica se određenim hemijskim postupcima može preraditi u koristan proizvod. Ipak, nedostatak adekvatnog tržišta, visoki troškovi reciklaže i neodgovarajući kvalitet reciklata su glavne prepreke komercijalizaciji reciklažnih postupaka kompozita.
PB  - Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd
T2  - Ecologica
T1  - Possibilities of composite materials recycling
T1  - Mogućnosti reciklaže kompozitnih materijala
EP  - 682
IS  - 72
SP  - 678
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2354
ER  - 

@article{
author = "Stamenović, Marina and Petrović, Jelena and Dimić, Ivana and Putić, Slaviša",
year = "2013",
abstract = "The use of composite material increases. Composite materials are used in a wide range of applications such as automotive, aerospace and other industries. But they have not been properly recycled, due to their inherent nature of heterogeneity. The current and future waste management and environmental legislations in EU require all engineering materials to be properly recovered and recycled from end-of-life (EOL) products. Recycling will ultimately lead to resource and energy saving. This work presents different possibilities for recycling composite. Various technologies have been developed: mechanical recycling, thermal recycling, and chemical recycling, depending on the applied operations during the recycling process. Mechanical recycling techniques involve the use of grinding techniques to comminute the scrap material and produce recycled products in different size ranges suitable for reuse as fillers or partial reinforcement in new composite material. Thermal techniques involve the use of heat resulting in releasing certain amounts of energy. Chemical recycling involves the process for chemical depolymerisation or removal of the matrix by using chemical dissolution reagents for liberation of fibres which can be reused. The removed matrix can process a useful product using a specific chemical procedures. However a lack of adequate markets, high recycling cost, and lower quality of the recyclates are the major commercialization barriers., Upotreba kompozitnih materijala je u stalnom porastu. Kompozitni materijali imaju široku primenu u različitim granama industrije, kao što su automobilska, avio industrija i druge. Međutim, oni se još uvek ne recikliraju adekvatno, najviše zbog njihove prirode, tj. heterogene strukture. Regulative koje se odnose na upravljanje otpadom i zaštitu životne sredine u Evropskoj Uniji propisuju da svi inženjerski materijali moraju biti reciklirani na kraju svog životnog veka, čime se postiže značajna ušteda energije. U ovom radu su prikazane različite mogućnosti reciklaže kompozitnih materijala. Postupci reciklaže mogu biti mehanički, toplotni i hemijski, u zavisnosti od primenjene operacije tokom procesa reciklaže. Mehanički postupci podrazumevaju korišćenje tehnika usitnjavanja kompozitnih materijala kako bi se dobili reciklati odgovarajućih dimenzija, nakon čega se isti mogu koristiti kao punioci ili kao ojačanja u novim kompozitnim materijalima. Termički postupci podrazumevaju korišćenje toplote tokom procesa reciklaže što rezultira oslobađanjem određene količine energije. U okviru hemijskih postupaka reciklaže primenjuje se proces depolimerizacije i uklanjanja matrice iz kompozita pomoću različitih reagenasa, čime se izdvajaju vlakna koja se mogu ponovo upotrebiti, a uklonjena matrica se određenim hemijskim postupcima može preraditi u koristan proizvod. Ipak, nedostatak adekvatnog tržišta, visoki troškovi reciklaže i neodgovarajući kvalitet reciklata su glavne prepreke komercijalizaciji reciklažnih postupaka kompozita.",
publisher = "Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd",
journal = "Ecologica",
title = "Possibilities of composite materials recycling, Mogućnosti reciklaže kompozitnih materijala",
pages = "682-678",
number = "72",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2354"
}

Stamenović, M., Petrović, J., Dimić, I.,& Putić, S.. (2013). Possibilities of composite materials recycling. in Ecologica
Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd., 20(72), 678-682.
https://hdl.handle.net/21.15107/rcub_technorep_2354

Stamenović M, Petrović J, Dimić I, Putić S. Possibilities of composite materials recycling. in Ecologica. 2013;20(72):678-682.
https://hdl.handle.net/21.15107/rcub_technorep_2354 .

Stamenović, Marina, Petrović, Jelena, Dimić, Ivana, Putić, Slaviša, "Possibilities of composite materials recycling" in Ecologica, 20, no. 72 (2013):678-682,
https://hdl.handle.net/21.15107/rcub_technorep_2354 .

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Bekrić, Dragoljub
AU  - Vujičić, Ivica T.
AU  - Dimić, Ivana
AU  - Putić, Slaviša
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2382
AB  - The main objective of the research presented in this paper was to carry out a statistical-mechanical analysis concerning the tensile test of glass-epoxy composite materials in order to calculate their relevant tension properties and micromechanical structure destruction process. The analysis was done at room temperature, and its results were derived based on the structure of the glass woven 280 g/m², 'twill texture' with the width value of 100 cm, type - Interglass 92125, and epoxy resin type MGS L 135. Samples were shaped by hands with 35% of fabric volume part. The consumed portion of resin was 220 g/m², the thickness of the laminate was 0.308 mm, and the mass of the laminate was 500 g/m2. There were a total of eight layers built in the panel. The micromechanical analysis was derived from the crack surfaces data collected on a scanning electronic microscope, and it showed the mechanisms of damage, and development of cracks until the occurrence of the final break under the tension load.
AB  - Predmet i cilj istraživanja prikazanih u ovom radu su statičko mehanička ispitivanja na zatezanje staklo-epoksi kompozitnog materijala radi dobijanja njegovih relevantnih zateznih svojstava i mikromehaničke analize oštećenja strukture. Ispitivanja su izvedena na sobnoj temperaturi. Analizirani su kompoziti na osnovu epoksidne smole tipa MGS LR 135 i staklenog platna 280 g/m², 'twill' širine 100 cm, tip - Interglas 92125. Uzorci su oblikovani ručnom metodom sa 35% zapreminskog udela vlakana. Utrošak smole je bio 220 g/m², debljina laminata 0,308 mm a masa laminata 500 g/m2. Ukupno je ugrađeno 8 platana u panelu. Analizom prelomnih površina na skening elektronskom mikroskopu izvedena je mikromehanička analiza kojom se došlo do saznanja o mehanizmima oštećenja i razvoju prsline do konačnog loma pri delovanju zateznog opterećenja.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Microstructural characterization of glass-epoxy composites subjected to tensile testing
T1  - Mikromehanička karakterizacija staklo-epoksi kompozita izloženog zateznom opterećenju
EP  - 162
IS  - 44
SP  - 151
DO  - 10.2298/APT1344151P
ER  - 

@article{
author = "Petrović, Jelena M. and Bekrić, Dragoljub and Vujičić, Ivica T. and Dimić, Ivana and Putić, Slaviša",
year = "2013",
abstract = "The main objective of the research presented in this paper was to carry out a statistical-mechanical analysis concerning the tensile test of glass-epoxy composite materials in order to calculate their relevant tension properties and micromechanical structure destruction process. The analysis was done at room temperature, and its results were derived based on the structure of the glass woven 280 g/m², 'twill texture' with the width value of 100 cm, type - Interglass 92125, and epoxy resin type MGS L 135. Samples were shaped by hands with 35% of fabric volume part. The consumed portion of resin was 220 g/m², the thickness of the laminate was 0.308 mm, and the mass of the laminate was 500 g/m2. There were a total of eight layers built in the panel. The micromechanical analysis was derived from the crack surfaces data collected on a scanning electronic microscope, and it showed the mechanisms of damage, and development of cracks until the occurrence of the final break under the tension load., Predmet i cilj istraživanja prikazanih u ovom radu su statičko mehanička ispitivanja na zatezanje staklo-epoksi kompozitnog materijala radi dobijanja njegovih relevantnih zateznih svojstava i mikromehaničke analize oštećenja strukture. Ispitivanja su izvedena na sobnoj temperaturi. Analizirani su kompoziti na osnovu epoksidne smole tipa MGS LR 135 i staklenog platna 280 g/m², 'twill' širine 100 cm, tip - Interglas 92125. Uzorci su oblikovani ručnom metodom sa 35% zapreminskog udela vlakana. Utrošak smole je bio 220 g/m², debljina laminata 0,308 mm a masa laminata 500 g/m2. Ukupno je ugrađeno 8 platana u panelu. Analizom prelomnih površina na skening elektronskom mikroskopu izvedena je mikromehanička analiza kojom se došlo do saznanja o mehanizmima oštećenja i razvoju prsline do konačnog loma pri delovanju zateznog opterećenja.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Microstructural characterization of glass-epoxy composites subjected to tensile testing, Mikromehanička karakterizacija staklo-epoksi kompozita izloženog zateznom opterećenju",
pages = "162-151",
number = "44",
doi = "10.2298/APT1344151P"
}

Petrović, J. M., Bekrić, D., Vujičić, I. T., Dimić, I.,& Putić, S.. (2013). Microstructural characterization of glass-epoxy composites subjected to tensile testing. in Acta periodica technologica
Faculty of Technology, Novi Sad.(44), 151-162.
https://doi.org/10.2298/APT1344151P

Petrović JM, Bekrić D, Vujičić IT, Dimić I, Putić S. Microstructural characterization of glass-epoxy composites subjected to tensile testing. in Acta periodica technologica. 2013;(44):151-162.
doi:10.2298/APT1344151P .

Petrović, Jelena M., Bekrić, Dragoljub, Vujičić, Ivica T., Dimić, Ivana, Putić, Slaviša, "Microstructural characterization of glass-epoxy composites subjected to tensile testing" in Acta periodica technologica, no. 44 (2013):151-162,
https://doi.org/10.2298/APT1344151P . .

TY  - JOUR
AU  - Tomović, Nataša
AU  - Dimić, Ivana
AU  - Rakin, Marko
AU  - Putić, Slaviša
AU  - Međo, Bojan
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2327
AB  - Upon the adoption of regulations for pressure equipment the series of standards SRPS EN 13445 began to apply. The paper illustrates strength calculation of a vertical cylindrical pressure vessel of austenitic steels according to SRPS EN 13445-3. The calculation includes a cylindrical shell and two shallow torispherical dish ends exposed to internal pressure of 0.5 MPa. The influence of working conditions and different values of the joint coefficient on the thickness of the cylindrical shell and dish ends is analysed.
AB  - Usvajanjem zakonske regulative iz oblasti opreme pod pritiskom počinje primena serije standarda SRPS EN 13445. U radu je prikazan proračun cilindrične vertikalne posude pod pritiskom od austenitnog čelika prema standardu SRPS EN 13445-3. Proračun obuhvata cilindrični omotač i dva plitka torisferična danca izložena dejstvu unutrašnjeg pritiska od 0,5 MPa. Analiziran je uticaj radnih uslova i različitih vrednosti koeficijenata zavarenih spojeva na debljinu zida cilindričnog omotača i danca.
PB  - Society for Structural Integrity and Life, Institute for Material Testing
T2  - Integritet i vek konstrukcija
T1  - Influence of working conditions on strength calculation of pressure vessel of austenitic steel according to SRPS EN 13445
T1  - Uticaj radnih uslova na proračun čvrstoće posude pod pritiskom od austenitnog čelika prema SRPS EN 13445
EP  - 140
IS  - 2
SP  - 137
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2327
ER  - 

@article{
author = "Tomović, Nataša and Dimić, Ivana and Rakin, Marko and Putić, Slaviša and Međo, Bojan",
year = "2013",
abstract = "Upon the adoption of regulations for pressure equipment the series of standards SRPS EN 13445 began to apply. The paper illustrates strength calculation of a vertical cylindrical pressure vessel of austenitic steels according to SRPS EN 13445-3. The calculation includes a cylindrical shell and two shallow torispherical dish ends exposed to internal pressure of 0.5 MPa. The influence of working conditions and different values of the joint coefficient on the thickness of the cylindrical shell and dish ends is analysed., Usvajanjem zakonske regulative iz oblasti opreme pod pritiskom počinje primena serije standarda SRPS EN 13445. U radu je prikazan proračun cilindrične vertikalne posude pod pritiskom od austenitnog čelika prema standardu SRPS EN 13445-3. Proračun obuhvata cilindrični omotač i dva plitka torisferična danca izložena dejstvu unutrašnjeg pritiska od 0,5 MPa. Analiziran je uticaj radnih uslova i različitih vrednosti koeficijenata zavarenih spojeva na debljinu zida cilindričnog omotača i danca.",
publisher = "Society for Structural Integrity and Life, Institute for Material Testing",
journal = "Integritet i vek konstrukcija",
title = "Influence of working conditions on strength calculation of pressure vessel of austenitic steel according to SRPS EN 13445, Uticaj radnih uslova na proračun čvrstoće posude pod pritiskom od austenitnog čelika prema SRPS EN 13445",
pages = "140-137",
number = "2",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2327"
}

Tomović, N., Dimić, I., Rakin, M., Putić, S.,& Međo, B.. (2013). Influence of working conditions on strength calculation of pressure vessel of austenitic steel according to SRPS EN 13445. in Integritet i vek konstrukcija
Society for Structural Integrity and Life, Institute for Material Testing., 13(2), 137-140.
https://hdl.handle.net/21.15107/rcub_technorep_2327

Tomović N, Dimić I, Rakin M, Putić S, Međo B. Influence of working conditions on strength calculation of pressure vessel of austenitic steel according to SRPS EN 13445. in Integritet i vek konstrukcija. 2013;13(2):137-140.
https://hdl.handle.net/21.15107/rcub_technorep_2327 .

Tomović, Nataša, Dimić, Ivana, Rakin, Marko, Putić, Slaviša, Međo, Bojan, "Influence of working conditions on strength calculation of pressure vessel of austenitic steel according to SRPS EN 13445" in Integritet i vek konstrukcija, 13, no. 2 (2013):137-140,
https://hdl.handle.net/21.15107/rcub_technorep_2327 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Rakin, Marica
AU  - Perić-Grujić, Aleksandra
AU  - Rakin, Marko
AU  - Bugarski, Branko
AU  - Putić, Slaviša
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2381
AB  - Due to their excellent characteristics, such as chemical inertness, mechanical resistance, low Young's modulus, high corrosion resistance, and outstanding biocompatibility, titanium and its alloys are the most used metallic materials for biomedical applications. In dental practice, these materials have demonstrated success as biomedical devices which are used for repairing and replacing failed hard tissue. However, the oral cavity is constantly subjected to the changes in the pH value changes and such an environment is strongly corrosive for titanium dental implants. The objective of this study was to examine ion release from commercially pure titanium (cpTi) in artificial saliva with different pH values (4.0, 5.5 and 7.5). The concentrations of released titanium ions were determined after 1, 3 and 6 weeks using Inductively Coupled Plasma - Mass Spectrometry. The results indicate that the ion release from commercially pure titanium in the artificial saliva is dependent both on the pH of artificial saliva and duration of immersion.
AB  - Titan i njegove legure su najčešće korišćeni metalni materijali za biomedicinsku primenu zbog njihovih odličnih karakteristika, kao što su hemijska inertnost, mehanička otpornost, nizak Jungov modul, visoka otpornost na koroziju i izvanredna biokompatibilnost. U stomatološkoj praksi, titan i njegove legure su pokazali uspeh kao biomedicinski uređaji, koji se koriste za popravku ili zamenu oštećenih čvrstih tkiva. Međutim, usna duplja je stalno izložena promenama pH vrednosti i takva sredina je izuzetno koroziona za dentalne implantate izrađene od titana. Cilj ovog rada je bio da se ispita otpuštanje jona iz komercijalno čistog titana (cpTi) u veštačkoj pljuvačci različite pH vrednosti (4.0, 5.5 i 7.5). Koncentracije otpuštenih jona titana su određene posle 1, 3 i 6 nedelja korišćenjem induktivno spregnute plazme sa masenom spektrometrijom (ICP-MS). Rezultati pokazuju da otpuštanje jona iz komercijalno čistog titana zavisi i od pH vrednosti veštačke pljuvačke i od dužine trajanja potapanja.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Effect of the pH of artificial saliva on ion release from commercially pure titanium
T1  - Uticaj pH vrednosti veštačke pljuvačke na otpuštanje jona iz komercijalno čistog titana
EP  - 215
IS  - 44
SP  - 207
DO  - 10.2298/APT1344207D
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Rakin, Marica and Perić-Grujić, Aleksandra and Rakin, Marko and Bugarski, Branko and Putić, Slaviša",
year = "2013",
abstract = "Due to their excellent characteristics, such as chemical inertness, mechanical resistance, low Young's modulus, high corrosion resistance, and outstanding biocompatibility, titanium and its alloys are the most used metallic materials for biomedical applications. In dental practice, these materials have demonstrated success as biomedical devices which are used for repairing and replacing failed hard tissue. However, the oral cavity is constantly subjected to the changes in the pH value changes and such an environment is strongly corrosive for titanium dental implants. The objective of this study was to examine ion release from commercially pure titanium (cpTi) in artificial saliva with different pH values (4.0, 5.5 and 7.5). The concentrations of released titanium ions were determined after 1, 3 and 6 weeks using Inductively Coupled Plasma - Mass Spectrometry. The results indicate that the ion release from commercially pure titanium in the artificial saliva is dependent both on the pH of artificial saliva and duration of immersion., Titan i njegove legure su najčešće korišćeni metalni materijali za biomedicinsku primenu zbog njihovih odličnih karakteristika, kao što su hemijska inertnost, mehanička otpornost, nizak Jungov modul, visoka otpornost na koroziju i izvanredna biokompatibilnost. U stomatološkoj praksi, titan i njegove legure su pokazali uspeh kao biomedicinski uređaji, koji se koriste za popravku ili zamenu oštećenih čvrstih tkiva. Međutim, usna duplja je stalno izložena promenama pH vrednosti i takva sredina je izuzetno koroziona za dentalne implantate izrađene od titana. Cilj ovog rada je bio da se ispita otpuštanje jona iz komercijalno čistog titana (cpTi) u veštačkoj pljuvačci različite pH vrednosti (4.0, 5.5 i 7.5). Koncentracije otpuštenih jona titana su određene posle 1, 3 i 6 nedelja korišćenjem induktivno spregnute plazme sa masenom spektrometrijom (ICP-MS). Rezultati pokazuju da otpuštanje jona iz komercijalno čistog titana zavisi i od pH vrednosti veštačke pljuvačke i od dužine trajanja potapanja.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Effect of the pH of artificial saliva on ion release from commercially pure titanium, Uticaj pH vrednosti veštačke pljuvačke na otpuštanje jona iz komercijalno čistog titana",
pages = "215-207",
number = "44",
doi = "10.2298/APT1344207D"
}

Dimić, I., Cvijović-Alagić, I., Rakin, M., Perić-Grujić, A., Rakin, M., Bugarski, B.,& Putić, S.. (2013). Effect of the pH of artificial saliva on ion release from commercially pure titanium. in Acta periodica technologica
Faculty of Technology, Novi Sad.(44), 207-215.
https://doi.org/10.2298/APT1344207D

Dimić I, Cvijović-Alagić I, Rakin M, Perić-Grujić A, Rakin M, Bugarski B, Putić S. Effect of the pH of artificial saliva on ion release from commercially pure titanium. in Acta periodica technologica. 2013;(44):207-215.
doi:10.2298/APT1344207D .

Dimić, Ivana, Cvijović-Alagić, Ivana, Rakin, Marica, Perić-Grujić, Aleksandra, Rakin, Marko, Bugarski, Branko, Putić, Slaviša, "Effect of the pH of artificial saliva on ion release from commercially pure titanium" in Acta periodica technologica, no. 44 (2013):207-215,
https://doi.org/10.2298/APT1344207D . .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Tomović, Nataša
AU  - Blažić, Jovan
AU  - Rakin, Marko
AU  - Bugarski, Branko
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2303
AB  - Standards SRPS M.E2.250-262 for calculation of pres-sure vessels have been replaced by SRPS EN 13445-3. This means that calculations of new equipment and check calculations of equipment in service are subjected to ordinance on the technical requirements for the design, development and conformity assessment of simple pressure vessels. The paper presents a strength design calculation of a horizontal cylindrical water tank according to a series of standards SRPS M.E2 and SRPS EN 13445, including a comparative analysis of results. The check calculation includes the cylindrical shell and two shallow torispherical dished ends under working pressure of 8 bar, and the assessment of decreased load-carrying capacity due to inspection opening DN400 at the spherical part of dished end.
AB  - Standardi SRPS M.E2.250-262 za proračun posuda pod pritiskom su zamenjeni standardom SRPS EN 13445-3. To podrazumeva da proračuni nove opreme, kao i kontrolni proračuni opreme u eksploataciji, podležu obaveznoj primeni Pravilnika o tehničkim zahtevima za projektovanje, izradu i ocenjivanje usaglašenosti jednostavnih posuda pod pritiskom. U radu je urađen kontrolni proračun čvrstoće cilindričnog horizontalnog rezervoara za vodu prema seriji standarda SRPS M.E2 i standardu SRPS EN 13445 i izvršena je uporedna analiza rezultata. Kontrolni proračun obuhvata cilindrični omotač i dva plitka torisferična danca izložena dejstvu unutrašnjeg pritiska od 8 bar, kao i procenu oslabljenja konstrukcije usled revizionog otvora DN400 na kaloti jednog od danaca.
PB  - Society for Structural Integrity and Life, Institute for Material Testing
T2  - Integritet i vek konstrukcija
T1  - Strength design calculation of a horizontal pressure vessel
T1  - Kontrolni proračun čvrstoće horizontalne posude pod pritiskom
EP  - 161
EP  - 
IS  - 3
SP  - 157
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2303
ER  - 

@article{
author = "Dimić, Ivana and Tomović, Nataša and Blažić, Jovan and Rakin, Marko and Bugarski, Branko",
year = "2013",
abstract = "Standards SRPS M.E2.250-262 for calculation of pres-sure vessels have been replaced by SRPS EN 13445-3. This means that calculations of new equipment and check calculations of equipment in service are subjected to ordinance on the technical requirements for the design, development and conformity assessment of simple pressure vessels. The paper presents a strength design calculation of a horizontal cylindrical water tank according to a series of standards SRPS M.E2 and SRPS EN 13445, including a comparative analysis of results. The check calculation includes the cylindrical shell and two shallow torispherical dished ends under working pressure of 8 bar, and the assessment of decreased load-carrying capacity due to inspection opening DN400 at the spherical part of dished end., Standardi SRPS M.E2.250-262 za proračun posuda pod pritiskom su zamenjeni standardom SRPS EN 13445-3. To podrazumeva da proračuni nove opreme, kao i kontrolni proračuni opreme u eksploataciji, podležu obaveznoj primeni Pravilnika o tehničkim zahtevima za projektovanje, izradu i ocenjivanje usaglašenosti jednostavnih posuda pod pritiskom. U radu je urađen kontrolni proračun čvrstoće cilindričnog horizontalnog rezervoara za vodu prema seriji standarda SRPS M.E2 i standardu SRPS EN 13445 i izvršena je uporedna analiza rezultata. Kontrolni proračun obuhvata cilindrični omotač i dva plitka torisferična danca izložena dejstvu unutrašnjeg pritiska od 8 bar, kao i procenu oslabljenja konstrukcije usled revizionog otvora DN400 na kaloti jednog od danaca.",
publisher = "Society for Structural Integrity and Life, Institute for Material Testing",
journal = "Integritet i vek konstrukcija",
title = "Strength design calculation of a horizontal pressure vessel, Kontrolni proračun čvrstoće horizontalne posude pod pritiskom",
pages = "161--157",
number = "3",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2303"
}

Dimić, I., Tomović, N., Blažić, J., Rakin, M.,& Bugarski, B.. (2013). Strength design calculation of a horizontal pressure vessel. in Integritet i vek konstrukcija
Society for Structural Integrity and Life, Institute for Material Testing., 13(3), 157-161.
https://hdl.handle.net/21.15107/rcub_technorep_2303

Dimić I, Tomović N, Blažić J, Rakin M, Bugarski B. Strength design calculation of a horizontal pressure vessel. in Integritet i vek konstrukcija. 2013;13(3):157-161.
https://hdl.handle.net/21.15107/rcub_technorep_2303 .

Dimić, Ivana, Tomović, Nataša, Blažić, Jovan, Rakin, Marko, Bugarski, Branko, "Strength design calculation of a horizontal pressure vessel" in Integritet i vek konstrukcija, 13, no. 3 (2013):157-161,
https://hdl.handle.net/21.15107/rcub_technorep_2303 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Rakin, Marko
AU  - Bugarski, Branko
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2326
AB  - Metallic biomaterials are commonly used for fixation or replacement of damaged bones in the human body due to their good combination of mechanical properties. The disadvantage of metals as implant materials is their susceptibility to corrosion and metal ion release, which can cause serious health problems. In certain concentrations metals and metal ions are toxic and their presence can cause diverse inflammatory reactions, genetic mutations or even cancer. In this paper, different approaches to metal ion release examination, from biometallic materials sample preparation to research results interpretation, will be presented. An overview of the analytical techniques, used for determination of the type and concentration of released ions from implants in simulated biofluids, is also given in the paper.
PB  - Association of Metallurgical Engineers of Serbia
T2  - Metallurgical & Materials Engineering
T1  - Analysis of metal ion release from biomedical implants
EP  - 176
IS  - 2
SP  - 167
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2326
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Rakin, Marko and Bugarski, Branko",
year = "2013",
abstract = "Metallic biomaterials are commonly used for fixation or replacement of damaged bones in the human body due to their good combination of mechanical properties. The disadvantage of metals as implant materials is their susceptibility to corrosion and metal ion release, which can cause serious health problems. In certain concentrations metals and metal ions are toxic and their presence can cause diverse inflammatory reactions, genetic mutations or even cancer. In this paper, different approaches to metal ion release examination, from biometallic materials sample preparation to research results interpretation, will be presented. An overview of the analytical techniques, used for determination of the type and concentration of released ions from implants in simulated biofluids, is also given in the paper.",
publisher = "Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering",
title = "Analysis of metal ion release from biomedical implants",
pages = "176-167",
number = "2",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2326"
}

Dimić, I., Cvijović-Alagić, I., Rakin, M.,& Bugarski, B.. (2013). Analysis of metal ion release from biomedical implants. in Metallurgical & Materials Engineering
Association of Metallurgical Engineers of Serbia., 19(2), 167-176.
https://hdl.handle.net/21.15107/rcub_technorep_2326

Dimić I, Cvijović-Alagić I, Rakin M, Bugarski B. Analysis of metal ion release from biomedical implants. in Metallurgical & Materials Engineering. 2013;19(2):167-176.
https://hdl.handle.net/21.15107/rcub_technorep_2326 .

Dimić, Ivana, Cvijović-Alagić, Ivana, Rakin, Marko, Bugarski, Branko, "Analysis of metal ion release from biomedical implants" in Metallurgical & Materials Engineering, 19, no. 2 (2013):167-176,
https://hdl.handle.net/21.15107/rcub_technorep_2326 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Arsić, Miodrag
AU  - Međo, Bojan
AU  - Stefanović, Ana
AU  - Grabulov, Vencislav
AU  - Rakin, Marko
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2515
AB  - Since local defects reduce the load-carrying capacity and deformation ability of a piping system, an analysis is undertaken to quantify the influence of weld defects on integrity of the pipe elbows subjected to internal pressure. Incompletely filled groove is examined, because this type of defect was previously detected by ultrasonic measurement on the inner surface of the pipeline from a hydro-power plant. Three-dimensional finite element analysis is conducted using Abaqus software package. The influence of weld defect geometry (its depth, length and location) on the elbow integrity is determined. Additionally, decrease of load carrying capacity is determined for the case when a crack has initiated at the bottom of the defect. The influence of finite element type (hexahedral or tetrahedral) is examined.
PB  - University of Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki vjesnik-Technical Gazette
T1  - Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure
EP  - 290
IS  - 2
SP  - 285
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2515
ER  - 

@article{
author = "Dimić, Ivana and Arsić, Miodrag and Međo, Bojan and Stefanović, Ana and Grabulov, Vencislav and Rakin, Marko",
year = "2013",
abstract = "Since local defects reduce the load-carrying capacity and deformation ability of a piping system, an analysis is undertaken to quantify the influence of weld defects on integrity of the pipe elbows subjected to internal pressure. Incompletely filled groove is examined, because this type of defect was previously detected by ultrasonic measurement on the inner surface of the pipeline from a hydro-power plant. Three-dimensional finite element analysis is conducted using Abaqus software package. The influence of weld defect geometry (its depth, length and location) on the elbow integrity is determined. Additionally, decrease of load carrying capacity is determined for the case when a crack has initiated at the bottom of the defect. The influence of finite element type (hexahedral or tetrahedral) is examined.",
publisher = "University of Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki vjesnik-Technical Gazette",
title = "Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure",
pages = "290-285",
number = "2",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2515"
}

Dimić, I., Arsić, M., Međo, B., Stefanović, A., Grabulov, V.,& Rakin, M.. (2013). Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure. in Tehnicki vjesnik-Technical Gazette
University of Osijek, Tech Fac, Slavonski Brod., 20(2), 285-290.
https://hdl.handle.net/21.15107/rcub_technorep_2515

Dimić I, Arsić M, Međo B, Stefanović A, Grabulov V, Rakin M. Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure. in Tehnicki vjesnik-Technical Gazette. 2013;20(2):285-290.
https://hdl.handle.net/21.15107/rcub_technorep_2515 .

Dimić, Ivana, Arsić, Miodrag, Međo, Bojan, Stefanović, Ana, Grabulov, Vencislav, Rakin, Marko, "Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure" in Tehnicki vjesnik-Technical Gazette, 20, no. 2 (2013):285-290,
https://hdl.handle.net/21.15107/rcub_technorep_2515 .

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Ljubić, Darko
AU  - Stamenović, Marina
AU  - Dimić, Ivana
AU  - Putić, Slaviša
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2033
AB  - The significance of composite materials and their applications are mainly due to their good properties. This imposes the need for their recycling, thus extending their lifetime. Once used composite material will be disposed as a waste at the end of it service life. After recycling, this kind of waste can be used as raw materials for the production of same material, which raises their applicability. This indicates a great importance of recycling as a method of the renowal of composite materials. This study represents a contribution to the field of mechanical properties of the recycled composite materials. The tension mechanical properties (tensile strength and modulus of elasticity) of once used and disposed glass-epoxy composite material were compared before and after the recycling. The obtained results from mechanical tests confirmed that the applied recycling method was suitable for glass-epoxy composite materials. In respect to the tensile strength and modulus of elasticity it can be further assessed the possibility of use of recycled glass-epoxy composite materials.
AB  - Primena kompozitnih materijala, zahvaljujući svojim dobrim svojstvima, svakim danom postaje sve veća što nameće pitanje mogućnosti njihovog recikliranja i time produženja njihovog životnog veka. Nakon jedanput korišćenog kompozitnog materijala u određene svrhe vrši se njihovo odlaganje u vidu otpada. Ovakav otpad uglavnom predstavlja sirovinu za proizvodnju iste vrste kompozita postupkom reciklaže, što povećava njihovu primenu. Imajući tu činjenicu u vidu, ovaj rad predstavlja doprinos u području istraživanja mehaničkih svojstava recikliranih kompozitnih materijala. U radu su prikazana zatezna mehanička svojstva staklo-epoksi kompozitniog materijala koji je bio u eksploataciji, postupak njegove reciklaže, kao i zatezna mehanička svojstva staklo-epoksi recikliranog kompozitnog materijala. Poređenjem rezultata se došlo do podataka o ispravnosti postupka reciklaže staklo-epoksi kompozitnog materijala kao i procene o daljoj mogućnosti primene, uzimajući u obzir dobijene vrednosti za zateznu čvrstoću i modul elastičnosti.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Tension mechanical properties of recycled glass-epoxy composite material
T1  - Mehanička svojstava recikliranog staklo-epoksi kompozitnog materijala
EP  - 198
IS  - 43
SP  - 189
DO  - 10.2298/APT1243189P
ER  - 

@article{
author = "Petrović, Jelena M. and Ljubić, Darko and Stamenović, Marina and Dimić, Ivana and Putić, Slaviša",
year = "2012",
abstract = "The significance of composite materials and their applications are mainly due to their good properties. This imposes the need for their recycling, thus extending their lifetime. Once used composite material will be disposed as a waste at the end of it service life. After recycling, this kind of waste can be used as raw materials for the production of same material, which raises their applicability. This indicates a great importance of recycling as a method of the renowal of composite materials. This study represents a contribution to the field of mechanical properties of the recycled composite materials. The tension mechanical properties (tensile strength and modulus of elasticity) of once used and disposed glass-epoxy composite material were compared before and after the recycling. The obtained results from mechanical tests confirmed that the applied recycling method was suitable for glass-epoxy composite materials. In respect to the tensile strength and modulus of elasticity it can be further assessed the possibility of use of recycled glass-epoxy composite materials., Primena kompozitnih materijala, zahvaljujući svojim dobrim svojstvima, svakim danom postaje sve veća što nameće pitanje mogućnosti njihovog recikliranja i time produženja njihovog životnog veka. Nakon jedanput korišćenog kompozitnog materijala u određene svrhe vrši se njihovo odlaganje u vidu otpada. Ovakav otpad uglavnom predstavlja sirovinu za proizvodnju iste vrste kompozita postupkom reciklaže, što povećava njihovu primenu. Imajući tu činjenicu u vidu, ovaj rad predstavlja doprinos u području istraživanja mehaničkih svojstava recikliranih kompozitnih materijala. U radu su prikazana zatezna mehanička svojstva staklo-epoksi kompozitniog materijala koji je bio u eksploataciji, postupak njegove reciklaže, kao i zatezna mehanička svojstva staklo-epoksi recikliranog kompozitnog materijala. Poređenjem rezultata se došlo do podataka o ispravnosti postupka reciklaže staklo-epoksi kompozitnog materijala kao i procene o daljoj mogućnosti primene, uzimajući u obzir dobijene vrednosti za zateznu čvrstoću i modul elastičnosti.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Tension mechanical properties of recycled glass-epoxy composite material, Mehanička svojstava recikliranog staklo-epoksi kompozitnog materijala",
pages = "198-189",
number = "43",
doi = "10.2298/APT1243189P"
}

Petrović, J. M., Ljubić, D., Stamenović, M., Dimić, I.,& Putić, S.. (2012). Tension mechanical properties of recycled glass-epoxy composite material. in Acta periodica technologica
Faculty of Technology, Novi Sad.(43), 189-198.
https://doi.org/10.2298/APT1243189P

Petrović JM, Ljubić D, Stamenović M, Dimić I, Putić S. Tension mechanical properties of recycled glass-epoxy composite material. in Acta periodica technologica. 2012;(43):189-198.
doi:10.2298/APT1243189P .

Petrović, Jelena M., Ljubić, Darko, Stamenović, Marina, Dimić, Ivana, Putić, Slaviša, "Tension mechanical properties of recycled glass-epoxy composite material" in Acta periodica technologica, no. 43 (2012):189-198,
https://doi.org/10.2298/APT1243189P . .