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  - 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 . .