TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Rakin, Marko
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4049
AB  - Wear damage behavior of new orthopedic Ti-13Nb-13Zr (mass %) alloy with martensitic microstructures developed by different thermo-mechanical treatments were examined during sliding in simulated physiological solution. The results obtained for this alloy processed by cold and hot rolling were compared with that of the standard Ti-6Al-4 V (mass %) alloy heat-treated to produce martensitic microstructure. The block-on-disk sliding friction and wear tests were conducted in Ringer's solution. The friction coefficient, wear rate, and wear damage mechanisms were determined over a range of normal loads (20-60 N) and linear sliding speeds (0.26-1.0 m/s). The surface damage morphology revealed the presence of corrosive, abrasive, and adhesive wear in all investigated materials. The friction and wear properties were found to be dependent on the predominant wear damage mechanism and applied load/sliding speed combination. In the case of a Ti-13Nb-13Zr alloy, the adhesive wear contributes to the higher wear rate and better friction behavior. This cold-rolled alloy, having a martensitic microstructure with the lowest hardness, shows the lowest friction coefficient values due to high material transfer from the alloy surface. The lowest friction resistance is observed for the Ti-6Al-4 V alloy with the highest hardness since the dominant wear damage mechanism is abrasion resulting in the low wear rate and material transfer.
PB  - Sage Publications Ltd, London
T2  - International Journal of Damage Mechanics
T1  - Damage behavior of orthopedic titanium alloys with martensitic microstructure during sliding wear in physiological solution
EP  - 1247
IS  - 8
SP  - 1228
VL  - 28
DO  - 10.1177/1056789518823049
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Rakin, Marko",
year = "2019",
abstract = "Wear damage behavior of new orthopedic Ti-13Nb-13Zr (mass %) alloy with martensitic microstructures developed by different thermo-mechanical treatments were examined during sliding in simulated physiological solution. The results obtained for this alloy processed by cold and hot rolling were compared with that of the standard Ti-6Al-4 V (mass %) alloy heat-treated to produce martensitic microstructure. The block-on-disk sliding friction and wear tests were conducted in Ringer's solution. The friction coefficient, wear rate, and wear damage mechanisms were determined over a range of normal loads (20-60 N) and linear sliding speeds (0.26-1.0 m/s). The surface damage morphology revealed the presence of corrosive, abrasive, and adhesive wear in all investigated materials. The friction and wear properties were found to be dependent on the predominant wear damage mechanism and applied load/sliding speed combination. In the case of a Ti-13Nb-13Zr alloy, the adhesive wear contributes to the higher wear rate and better friction behavior. This cold-rolled alloy, having a martensitic microstructure with the lowest hardness, shows the lowest friction coefficient values due to high material transfer from the alloy surface. The lowest friction resistance is observed for the Ti-6Al-4 V alloy with the highest hardness since the dominant wear damage mechanism is abrasion resulting in the low wear rate and material transfer.",
publisher = "Sage Publications Ltd, London",
journal = "International Journal of Damage Mechanics",
title = "Damage behavior of orthopedic titanium alloys with martensitic microstructure during sliding wear in physiological solution",
pages = "1247-1228",
number = "8",
volume = "28",
doi = "10.1177/1056789518823049"
}

Cvijović-Alagić, I., Cvijović, Z.,& Rakin, M.. (2019). Damage behavior of orthopedic titanium alloys with martensitic microstructure during sliding wear in physiological solution. in International Journal of Damage Mechanics
Sage Publications Ltd, London., 28(8), 1228-1247.
https://doi.org/10.1177/1056789518823049

Cvijović-Alagić I, Cvijović Z, Rakin M. Damage behavior of orthopedic titanium alloys with martensitic microstructure during sliding wear in physiological solution. in International Journal of Damage Mechanics. 2019;28(8):1228-1247.
doi:10.1177/1056789518823049 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Rakin, Marko, "Damage behavior of orthopedic titanium alloys with martensitic microstructure during sliding wear in physiological solution" in International Journal of Damage Mechanics, 28, no. 8 (2019):1228-1247,
https://doi.org/10.1177/1056789518823049 . .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Maletaškić, Jelena
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3929
AB  - effect of initial microstructure on the mechanical properties and fracture mode of the Ti-6Al-4V ELI alloy subjected to the high-pressure torsion (HPT) processing at room temperature and 500 degrees C was investigated. In this purpose, the four different microstructures (fully lamellar, martensitic, equiaxed and globular microstructures) were developed by the proper heat treatments. The results showed that the application of the HPT processing provided substantial microstructural refinement, independent on the alloy initial microstructure. As a consequence, the alloy hardness, tensile strength and ductility significantly increased. At the same time, the elastic modulus of the HPT-processed alloy is almost 2 times lower as compared to that of the alloy in the initial heat treated state. The obtained improvements strongly depend on the alloy initial microstructure and HPT processing temperature. It was found that the initial martensitic microstructure is beneficial to improve the hardness, tensile and fracture properties. The HPT processing at 500 degrees C enhanced them more effectively. After the warm HPT processing, alloy with the initial martensitic microstructure exhibited exceptional hardness (455 MPa), high ultimate tensile strength (1546 MPa), high elongation to failure (18.8%) and low elastic modulus (78.6 GPa). Although the alloy with initial fully lamellar microstructure displayed the lowest elastic modulus (68 GPa), the ultrafine and homogeneous (alpha + beta) two-phase microstructure produced by the HPT processing of the alloy with initial martensitic microstructure offered the best combination of the strength-ductility balance and strength-to-elastic modulus ratio (19.8 x 10(-3)). The complex fracture process, involving transgranular quasi-cleavage and ductile dimple fracture mode, corresponded to the changes in ductility.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
T1  - Initial microstructure effect on the mechanical properties of Ti-6Al-4V ELI alloy processed by high-pressure torsion
EP  - 192
SP  - 175
VL  - 736
DO  - 10.1016/j.msea.2018.08.094
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Maletaškić, Jelena and Rakin, Marko",
year = "2018",
abstract = "effect of initial microstructure on the mechanical properties and fracture mode of the Ti-6Al-4V ELI alloy subjected to the high-pressure torsion (HPT) processing at room temperature and 500 degrees C was investigated. In this purpose, the four different microstructures (fully lamellar, martensitic, equiaxed and globular microstructures) were developed by the proper heat treatments. The results showed that the application of the HPT processing provided substantial microstructural refinement, independent on the alloy initial microstructure. As a consequence, the alloy hardness, tensile strength and ductility significantly increased. At the same time, the elastic modulus of the HPT-processed alloy is almost 2 times lower as compared to that of the alloy in the initial heat treated state. The obtained improvements strongly depend on the alloy initial microstructure and HPT processing temperature. It was found that the initial martensitic microstructure is beneficial to improve the hardness, tensile and fracture properties. The HPT processing at 500 degrees C enhanced them more effectively. After the warm HPT processing, alloy with the initial martensitic microstructure exhibited exceptional hardness (455 MPa), high ultimate tensile strength (1546 MPa), high elongation to failure (18.8%) and low elastic modulus (78.6 GPa). Although the alloy with initial fully lamellar microstructure displayed the lowest elastic modulus (68 GPa), the ultrafine and homogeneous (alpha + beta) two-phase microstructure produced by the HPT processing of the alloy with initial martensitic microstructure offered the best combination of the strength-ductility balance and strength-to-elastic modulus ratio (19.8 x 10(-3)). The complex fracture process, involving transgranular quasi-cleavage and ductile dimple fracture mode, corresponded to the changes in ductility.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing",
title = "Initial microstructure effect on the mechanical properties of Ti-6Al-4V ELI alloy processed by high-pressure torsion",
pages = "192-175",
volume = "736",
doi = "10.1016/j.msea.2018.08.094"
}

Cvijović-Alagić, I., Cvijović, Z., Maletaškić, J.,& Rakin, M.. (2018). Initial microstructure effect on the mechanical properties of Ti-6Al-4V ELI alloy processed by high-pressure torsion. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Elsevier Science Sa, Lausanne., 736, 175-192.
https://doi.org/10.1016/j.msea.2018.08.094

Cvijović-Alagić I, Cvijović Z, Maletaškić J, Rakin M. Initial microstructure effect on the mechanical properties of Ti-6Al-4V ELI alloy processed by high-pressure torsion. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing. 2018;736:175-192.
doi:10.1016/j.msea.2018.08.094 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Maletaškić, Jelena, Rakin, Marko, "Initial microstructure effect on the mechanical properties of Ti-6Al-4V ELI alloy processed by high-pressure torsion" in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 736 (2018):175-192,
https://doi.org/10.1016/j.msea.2018.08.094 . .

TY  - CONF
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Gubeljak, Nenad
AU  - Rakin, Marko
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6339
PB  - Ruđer Bošković Institute and Croatian Microscopy Society
C3  - 13th Multinational Congress on Microscopy (MCM2017)
T1  - Fractographic analysis of biomedical Ti-based alloys with acicular microstructures
EP  - 680
SP  - 679
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6339
ER  - 

@conference{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Gubeljak, Nenad and Rakin, Marko",
year = "2017",
publisher = "Ruđer Bošković Institute and Croatian Microscopy Society",
journal = "13th Multinational Congress on Microscopy (MCM2017)",
title = "Fractographic analysis of biomedical Ti-based alloys with acicular microstructures",
pages = "680-679",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6339"
}

Cvijović-Alagić, I., Cvijović, Z., Gubeljak, N.,& Rakin, M.. (2017). Fractographic analysis of biomedical Ti-based alloys with acicular microstructures. in 13th Multinational Congress on Microscopy (MCM2017)
Ruđer Bošković Institute and Croatian Microscopy Society., 679-680.
https://hdl.handle.net/21.15107/rcub_technorep_6339

Cvijović-Alagić I, Cvijović Z, Gubeljak N, Rakin M. Fractographic analysis of biomedical Ti-based alloys with acicular microstructures. in 13th Multinational Congress on Microscopy (MCM2017). 2017;:679-680.
https://hdl.handle.net/21.15107/rcub_technorep_6339 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Gubeljak, Nenad, Rakin, Marko, "Fractographic analysis of biomedical Ti-based alloys with acicular microstructures" in 13th Multinational Congress on Microscopy (MCM2017) (2017):679-680,
https://hdl.handle.net/21.15107/rcub_technorep_6339 .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3259
AB  - The electrochemical behaviour of the Ti-6Al-4V ELI alloy with different microstructures was investigated in Ringer's solution at 25 degrees C. It was found that the properties of both inner barrier and outer porous layers of the passive film were dependent on the microstructural morphology and distribution of the alloying elements resulting in various amounts of their oxides incorporated in the TiO2 matrix. A more resistant and capacitive barrier layer formed on the alloy with fully lamellar, martensitic and globular microstructures in different thickness assured its high corrosion protection. The improved corrosion resistance of the alloy with equiaxed microstructure was provided by the existence of the larger amounts of the Al2O3 and V2O5 oxides, contributing to higher resistance of the outer porous layer. The Al2O3 amount is smaller than that of the V2O5 oxide due to its higher dissolution, especially in the case of the alloy with fully lamellar microstructure, resulting in the formation of a more porous outer layer.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Materials and Corrosion-Werkstoffe Und Korrosion
T1  - Electrochemical behaviour of Ti-6Al-4V alloy with different microstructures in a simulated bio-environment
EP  - 1087
IS  - 10
SP  - 1075
VL  - 67
DO  - 10.1002/maco.201508796
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Bajat, Jelena and Rakin, Marko",
year = "2016",
abstract = "The electrochemical behaviour of the Ti-6Al-4V ELI alloy with different microstructures was investigated in Ringer's solution at 25 degrees C. It was found that the properties of both inner barrier and outer porous layers of the passive film were dependent on the microstructural morphology and distribution of the alloying elements resulting in various amounts of their oxides incorporated in the TiO2 matrix. A more resistant and capacitive barrier layer formed on the alloy with fully lamellar, martensitic and globular microstructures in different thickness assured its high corrosion protection. The improved corrosion resistance of the alloy with equiaxed microstructure was provided by the existence of the larger amounts of the Al2O3 and V2O5 oxides, contributing to higher resistance of the outer porous layer. The Al2O3 amount is smaller than that of the V2O5 oxide due to its higher dissolution, especially in the case of the alloy with fully lamellar microstructure, resulting in the formation of a more porous outer layer.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Materials and Corrosion-Werkstoffe Und Korrosion",
title = "Electrochemical behaviour of Ti-6Al-4V alloy with different microstructures in a simulated bio-environment",
pages = "1087-1075",
number = "10",
volume = "67",
doi = "10.1002/maco.201508796"
}

Cvijović-Alagić, I., Cvijović, Z., Bajat, J.,& Rakin, M.. (2016). Electrochemical behaviour of Ti-6Al-4V alloy with different microstructures in a simulated bio-environment. in Materials and Corrosion-Werkstoffe Und Korrosion
Wiley-VCH Verlag Gmbh, Weinheim., 67(10), 1075-1087.
https://doi.org/10.1002/maco.201508796

Cvijović-Alagić I, Cvijović Z, Bajat J, Rakin M. Electrochemical behaviour of Ti-6Al-4V alloy with different microstructures in a simulated bio-environment. in Materials and Corrosion-Werkstoffe Und Korrosion. 2016;67(10):1075-1087.
doi:10.1002/maco.201508796 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Bajat, Jelena, Rakin, Marko, "Electrochemical behaviour of Ti-6Al-4V alloy with different microstructures in a simulated bio-environment" in Materials and Corrosion-Werkstoffe Und Korrosion, 67, no. 10 (2016):1075-1087,
https://doi.org/10.1002/maco.201508796 . .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Gubeljak, Nenad
AU  - Rakin, Marko
AU  - Cvijović, Zorica
AU  - Gerić, K.
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2766
AB  - The effects of microstructural morphology on the fracture behavior of Ti-6Al-4V ELI (extra-low impurity) alloy in two different heat treatment conditions were examined. Alloy was solution treated above (beta ST) and below (alpha + beta ST) beta transus temperature followed by furnace cooling (FC) in order to obtain the fully lamellar and equiaxed microstructures. Tensile and fracture toughness tests were conducted. The crack tip opening displacement (CTOD) and strain distribution near the crack tip were measured on the compact tension (CT) specimen surface by digital stereometric method. The crack propagation resistance (CTOD-R) curves were developed by applying the modified normalization method and critical CTOD values were determined. To identify the microstructural length scale controlling the fracture resistance of this alloy, the crack propagation path and fracture surface morphology were evaluated. It was found that the reduction in the characteristic microstructural dimension of an order of magnitude and significant change in the alpha phase aspect ratio contribute to drastic increase in the tensile properties and decrease in the crack initiation and propagation resistance. The fully lamellar microstructure displays slightly better biocompatibility because of the lower elastic modulus and superior fracture resistance. The enhanced crack propagation resistance of this microstructure is associated with the larger propensity for crack tip tortuousity, due to the coarser microstructural dimensions (lamellar colony size vs. primary alpha grain size). The difference in the crack propagation modes affects the shape and size of the actual crack tip strain distribution. These results were discussed correlating the complex multiple fracture mechanisms with the stress state in two microstructures.
PB  - Elsevier Sci Ltd, Oxford
T2  - Materials & Design
T1  - Microstructural morphology effects on fracture resistance and crack tip strain distribution in Ti-6Al-4V alloy for orthopedic implants
EP  - 880
SP  - 870
VL  - 53
DO  - 10.1016/j.matdes.2013.07.097
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Gubeljak, Nenad and Rakin, Marko and Cvijović, Zorica and Gerić, K.",
year = "2014",
abstract = "The effects of microstructural morphology on the fracture behavior of Ti-6Al-4V ELI (extra-low impurity) alloy in two different heat treatment conditions were examined. Alloy was solution treated above (beta ST) and below (alpha + beta ST) beta transus temperature followed by furnace cooling (FC) in order to obtain the fully lamellar and equiaxed microstructures. Tensile and fracture toughness tests were conducted. The crack tip opening displacement (CTOD) and strain distribution near the crack tip were measured on the compact tension (CT) specimen surface by digital stereometric method. The crack propagation resistance (CTOD-R) curves were developed by applying the modified normalization method and critical CTOD values were determined. To identify the microstructural length scale controlling the fracture resistance of this alloy, the crack propagation path and fracture surface morphology were evaluated. It was found that the reduction in the characteristic microstructural dimension of an order of magnitude and significant change in the alpha phase aspect ratio contribute to drastic increase in the tensile properties and decrease in the crack initiation and propagation resistance. The fully lamellar microstructure displays slightly better biocompatibility because of the lower elastic modulus and superior fracture resistance. The enhanced crack propagation resistance of this microstructure is associated with the larger propensity for crack tip tortuousity, due to the coarser microstructural dimensions (lamellar colony size vs. primary alpha grain size). The difference in the crack propagation modes affects the shape and size of the actual crack tip strain distribution. These results were discussed correlating the complex multiple fracture mechanisms with the stress state in two microstructures.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Materials & Design",
title = "Microstructural morphology effects on fracture resistance and crack tip strain distribution in Ti-6Al-4V alloy for orthopedic implants",
pages = "880-870",
volume = "53",
doi = "10.1016/j.matdes.2013.07.097"
}

Cvijović-Alagić, I., Gubeljak, N., Rakin, M., Cvijović, Z.,& Gerić, K.. (2014). Microstructural morphology effects on fracture resistance and crack tip strain distribution in Ti-6Al-4V alloy for orthopedic implants. in Materials & Design
Elsevier Sci Ltd, Oxford., 53, 870-880.
https://doi.org/10.1016/j.matdes.2013.07.097

Cvijović-Alagić I, Gubeljak N, Rakin M, Cvijović Z, Gerić K. Microstructural morphology effects on fracture resistance and crack tip strain distribution in Ti-6Al-4V alloy for orthopedic implants. in Materials & Design. 2014;53:870-880.
doi:10.1016/j.matdes.2013.07.097 .

Cvijović-Alagić, Ivana, Gubeljak, Nenad, Rakin, Marko, Cvijović, Zorica, Gerić, K., "Microstructural morphology effects on fracture resistance and crack tip strain distribution in Ti-6Al-4V alloy for orthopedic implants" in Materials & Design, 53 (2014):870-880,
https://doi.org/10.1016/j.matdes.2013.07.097 . .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2854
AB  - The electrochemical behaviour of the Ti-13Nb-13Zr and Ti-6Al-4V ELI alloys with martensitic microstructures was investigated by polarization and electrochemical impedance spectroscopy (EIS) in Ringer's solution. The impedance spectra were interpreted by a two time-constants equivalent circuit. Both investigated alloys showed high corrosion resistance, but the thin and uniform passive film on the Ti-6Al-4V ELI alloy surface was more protective. The inner barrier and outer porous layer were highly resistant and capacitive. However, thicker and more porous passive film on the Ti-13Nb-13Zr alloy surface may be beneficial for osteointegration. The suitable thermomechanical processing improved the corrosion resistance of Ti-13Nb-13Zr alloy.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Corrosion Science
T1  - Composition and processing effects on the electrochemical characteristics of biomedical titanium alloys
EP  - 254
SP  - 245
VL  - 83
DO  - 10.1016/j.corsci.2014.02.017
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Bajat, Jelena and Rakin, Marko",
year = "2014",
abstract = "The electrochemical behaviour of the Ti-13Nb-13Zr and Ti-6Al-4V ELI alloys with martensitic microstructures was investigated by polarization and electrochemical impedance spectroscopy (EIS) in Ringer's solution. The impedance spectra were interpreted by a two time-constants equivalent circuit. Both investigated alloys showed high corrosion resistance, but the thin and uniform passive film on the Ti-6Al-4V ELI alloy surface was more protective. The inner barrier and outer porous layer were highly resistant and capacitive. However, thicker and more porous passive film on the Ti-13Nb-13Zr alloy surface may be beneficial for osteointegration. The suitable thermomechanical processing improved the corrosion resistance of Ti-13Nb-13Zr alloy.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Corrosion Science",
title = "Composition and processing effects on the electrochemical characteristics of biomedical titanium alloys",
pages = "254-245",
volume = "83",
doi = "10.1016/j.corsci.2014.02.017"
}

Cvijović-Alagić, I., Cvijović, Z., Bajat, J.,& Rakin, M.. (2014). Composition and processing effects on the electrochemical characteristics of biomedical titanium alloys. in Corrosion Science
Pergamon-Elsevier Science Ltd, Oxford., 83, 245-254.
https://doi.org/10.1016/j.corsci.2014.02.017

Cvijović-Alagić I, Cvijović Z, Bajat J, Rakin M. Composition and processing effects on the electrochemical characteristics of biomedical titanium alloys. in Corrosion Science. 2014;83:245-254.
doi:10.1016/j.corsci.2014.02.017 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Bajat, Jelena, Rakin, Marko, "Composition and processing effects on the electrochemical characteristics of biomedical titanium alloys" in Corrosion Science, 83 (2014):245-254,
https://doi.org/10.1016/j.corsci.2014.02.017 . .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Mitrović, Slobodan
AU  - Panić, V.
AU  - Rakin, Marko
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1935
AB  - Wear and corrosion behaviour of cold-rolled Ti-13Nb-13Zr alloy, with martensitic microstructure, and Ti-6Al-4V ELI alloy, in martensitic and two-phase (alpha + beta) microstructural conditions, was studied in a Ringer's solution. The wear experiments were performed at room temperature with a normal load of 40 N and sliding speeds 0.26. 0.5 and 1.0 m/s. The corrosion behaviour was studied at 37 degrees C using open circuit potential-time measurements and potentiodynamic polarization. It was found that Ti-13Nb-13Zr alloy has a substantially lower wear resistance than Ti-6Al-4V ELI alloy in both microstructural conditions. Surface damage extent increases with sliding speed increase and is always smallest for martensitic Ti-6Al-4V ELI alloy with highest hardness. Both alloys exhibit spontaneous passivity in Ringer's solution. Corrosion potential values are similar for all three materials. However, Ti-13Nb-13Zr and martensitic Ti-6Al-4V ELI alloys show improved corrosion resistance comparatively to Ti-6Al-4V ELI alloy with (alpha + beta) microstructure. Martensitic Ti-6Al-4V ELI alloy possesses the best combination of both corrosion and wear resistance, although its corrosion resistance is found to be slightly higher than that of the Ti-13Nb-13Zr alloy.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Corrosion Science
T1  - Wear and corrosion behaviour of Ti-13Nb-13Zr and Ti-6Al-4V alloys in simulated physiological solution
EP  - 808
IS  - 2
SP  - 796
VL  - 53
DO  - 10.1016/j.corsci.2010.11.014
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Mitrović, Slobodan and Panić, V. and Rakin, Marko",
year = "2011",
abstract = "Wear and corrosion behaviour of cold-rolled Ti-13Nb-13Zr alloy, with martensitic microstructure, and Ti-6Al-4V ELI alloy, in martensitic and two-phase (alpha + beta) microstructural conditions, was studied in a Ringer's solution. The wear experiments were performed at room temperature with a normal load of 40 N and sliding speeds 0.26. 0.5 and 1.0 m/s. The corrosion behaviour was studied at 37 degrees C using open circuit potential-time measurements and potentiodynamic polarization. It was found that Ti-13Nb-13Zr alloy has a substantially lower wear resistance than Ti-6Al-4V ELI alloy in both microstructural conditions. Surface damage extent increases with sliding speed increase and is always smallest for martensitic Ti-6Al-4V ELI alloy with highest hardness. Both alloys exhibit spontaneous passivity in Ringer's solution. Corrosion potential values are similar for all three materials. However, Ti-13Nb-13Zr and martensitic Ti-6Al-4V ELI alloys show improved corrosion resistance comparatively to Ti-6Al-4V ELI alloy with (alpha + beta) microstructure. Martensitic Ti-6Al-4V ELI alloy possesses the best combination of both corrosion and wear resistance, although its corrosion resistance is found to be slightly higher than that of the Ti-13Nb-13Zr alloy.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Corrosion Science",
title = "Wear and corrosion behaviour of Ti-13Nb-13Zr and Ti-6Al-4V alloys in simulated physiological solution",
pages = "808-796",
number = "2",
volume = "53",
doi = "10.1016/j.corsci.2010.11.014"
}

Cvijović-Alagić, I., Cvijović, Z., Mitrović, S., Panić, V.,& Rakin, M.. (2011). Wear and corrosion behaviour of Ti-13Nb-13Zr and Ti-6Al-4V alloys in simulated physiological solution. in Corrosion Science
Pergamon-Elsevier Science Ltd, Oxford., 53(2), 796-808.
https://doi.org/10.1016/j.corsci.2010.11.014

Cvijović-Alagić I, Cvijović Z, Mitrović S, Panić V, Rakin M. Wear and corrosion behaviour of Ti-13Nb-13Zr and Ti-6Al-4V alloys in simulated physiological solution. in Corrosion Science. 2011;53(2):796-808.
doi:10.1016/j.corsci.2010.11.014 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Mitrović, Slobodan, Panić, V., Rakin, Marko, "Wear and corrosion behaviour of Ti-13Nb-13Zr and Ti-6Al-4V alloys in simulated physiological solution" in Corrosion Science, 53, no. 2 (2011):796-808,
https://doi.org/10.1016/j.corsci.2010.11.014 . .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Cvijović, Zorica
AU  - Mitrović, Slobodan
AU  - Rakin, Marko
AU  - Veljović, Đorđe
AU  - Babić, Miroslav
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1665
AB  - The aim of this study is to compare the tribological behaviour of novel orthopaedic implant alloy Ti-13Nb-13Zr with that of the standard Ti-6Al-4V ELI alloy, available in four different microstructural conditions produced by variations in the heat treatments. The friction and wear tests were performed by using a block-on-disc tribometer in Ringer's solution at ambient temperature with a normal load of 20-60 N and sliding speed of 0.26-1.0 m/s. It was found that variations in microstructures produced significant variations in the wear resistance of Ti-6Al-4V ELI alloy. The wear losses of materials solution treated (ST) above the beta transus temperature are significantly lower compared with those of materials ST in the (alpha + beta) phase field and are almost insensitive to applied load and sliding speed. Wear loss of the (alpha + beta) ST Ti-6Al-4V ELI alloy continuously increased as applied load was increased and was highest at the highest sliding speed. The Ti-6Al-4V ELI alloy in all microstructural conditions possesses a much better wear resistance than cold-rolled Ti-13Nb-13Zr alloy. Friction results and morphology of worn surfaces showed that the observed behaviour is attributed to the predominant wear damage mechanism.
PB  - Springer/Plenum Publishers, New York
T2  - Tribology Letters
T1  - Tribological Behaviour of Orthopaedic Ti-13Nb-13Zr and Ti-6Al-4V Alloys
EP  - 70
IS  - 1
SP  - 59
VL  - 40
DO  - 10.1007/s11249-010-9639-8
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Cvijović, Zorica and Mitrović, Slobodan and Rakin, Marko and Veljović, Đorđe and Babić, Miroslav",
year = "2010",
abstract = "The aim of this study is to compare the tribological behaviour of novel orthopaedic implant alloy Ti-13Nb-13Zr with that of the standard Ti-6Al-4V ELI alloy, available in four different microstructural conditions produced by variations in the heat treatments. The friction and wear tests were performed by using a block-on-disc tribometer in Ringer's solution at ambient temperature with a normal load of 20-60 N and sliding speed of 0.26-1.0 m/s. It was found that variations in microstructures produced significant variations in the wear resistance of Ti-6Al-4V ELI alloy. The wear losses of materials solution treated (ST) above the beta transus temperature are significantly lower compared with those of materials ST in the (alpha + beta) phase field and are almost insensitive to applied load and sliding speed. Wear loss of the (alpha + beta) ST Ti-6Al-4V ELI alloy continuously increased as applied load was increased and was highest at the highest sliding speed. The Ti-6Al-4V ELI alloy in all microstructural conditions possesses a much better wear resistance than cold-rolled Ti-13Nb-13Zr alloy. Friction results and morphology of worn surfaces showed that the observed behaviour is attributed to the predominant wear damage mechanism.",
publisher = "Springer/Plenum Publishers, New York",
journal = "Tribology Letters",
title = "Tribological Behaviour of Orthopaedic Ti-13Nb-13Zr and Ti-6Al-4V Alloys",
pages = "70-59",
number = "1",
volume = "40",
doi = "10.1007/s11249-010-9639-8"
}

Cvijović-Alagić, I., Cvijović, Z., Mitrović, S., Rakin, M., Veljović, Đ.,& Babić, M.. (2010). Tribological Behaviour of Orthopaedic Ti-13Nb-13Zr and Ti-6Al-4V Alloys. in Tribology Letters
Springer/Plenum Publishers, New York., 40(1), 59-70.
https://doi.org/10.1007/s11249-010-9639-8

Cvijović-Alagić I, Cvijović Z, Mitrović S, Rakin M, Veljović Đ, Babić M. Tribological Behaviour of Orthopaedic Ti-13Nb-13Zr and Ti-6Al-4V Alloys. in Tribology Letters. 2010;40(1):59-70.
doi:10.1007/s11249-010-9639-8 .

Cvijović-Alagić, Ivana, Cvijović, Zorica, Mitrović, Slobodan, Rakin, Marko, Veljović, Đorđe, Babić, Miroslav, "Tribological Behaviour of Orthopaedic Ti-13Nb-13Zr and Ti-6Al-4V Alloys" in Tribology Letters, 40, no. 1 (2010):59-70,
https://doi.org/10.1007/s11249-010-9639-8 . .

TY  - JOUR
AU  - Cekerevac, M. I.
AU  - Romhanji, Endre
AU  - Cvijović, Zorica
AU  - Bujanović, L. N.
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1679
AB  - The effect of microstructure modifiers, Sn and Ag, on the corrosion rate of commercial Pb-Ca alloy in H(2)SO(4) electrolyte was investigated by the potentiodynamic polarization and by the weight loss corrosion rate measurement at the open circuit potential. The effect of microstructure modification of the Pb-Ca alloy, provoked by the alloying with tin and silver as well as by the proper thermo-mechanical treatment, is recorded by optical microscopy. The weight loss experiments have shown three- to five-fold decreases in the corrosion rate of ternary Pb-Ca-Sn and quaternary Pb-Ca-Sn-Ag alloys, compared to the results for primary Pb-Ca alloy. It is largely in accordance with the results of potentiodynamic polarization measurements that showed comparable decrease in the passive current density of the modified alloys. The obtained results are discussed in terms of the synergetic effect of the addition of modifiers and the thermo-mechanical treatment on to the Pb-Ca alloy microstructure refinement, and accordingly the increase in their corrosion resistance.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Materials and Corrosion-Werkstoffe Und Korrosion
T1  - The influence of tin and silver as microstructure modifiers on the corrosion rate of Pb-Ca alloys in sulfuric acid solutions
EP  - 57
IS  - 1
SP  - 51
VL  - 61
DO  - 10.1002/maco.200905246
ER  - 

@article{
author = "Cekerevac, M. I. and Romhanji, Endre and Cvijović, Zorica and Bujanović, L. N.",
year = "2010",
abstract = "The effect of microstructure modifiers, Sn and Ag, on the corrosion rate of commercial Pb-Ca alloy in H(2)SO(4) electrolyte was investigated by the potentiodynamic polarization and by the weight loss corrosion rate measurement at the open circuit potential. The effect of microstructure modification of the Pb-Ca alloy, provoked by the alloying with tin and silver as well as by the proper thermo-mechanical treatment, is recorded by optical microscopy. The weight loss experiments have shown three- to five-fold decreases in the corrosion rate of ternary Pb-Ca-Sn and quaternary Pb-Ca-Sn-Ag alloys, compared to the results for primary Pb-Ca alloy. It is largely in accordance with the results of potentiodynamic polarization measurements that showed comparable decrease in the passive current density of the modified alloys. The obtained results are discussed in terms of the synergetic effect of the addition of modifiers and the thermo-mechanical treatment on to the Pb-Ca alloy microstructure refinement, and accordingly the increase in their corrosion resistance.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Materials and Corrosion-Werkstoffe Und Korrosion",
title = "The influence of tin and silver as microstructure modifiers on the corrosion rate of Pb-Ca alloys in sulfuric acid solutions",
pages = "57-51",
number = "1",
volume = "61",
doi = "10.1002/maco.200905246"
}

Cekerevac, M. I., Romhanji, E., Cvijović, Z.,& Bujanović, L. N.. (2010). The influence of tin and silver as microstructure modifiers on the corrosion rate of Pb-Ca alloys in sulfuric acid solutions. in Materials and Corrosion-Werkstoffe Und Korrosion
Wiley-VCH Verlag Gmbh, Weinheim., 61(1), 51-57.
https://doi.org/10.1002/maco.200905246

Cekerevac MI, Romhanji E, Cvijović Z, Bujanović LN. The influence of tin and silver as microstructure modifiers on the corrosion rate of Pb-Ca alloys in sulfuric acid solutions. in Materials and Corrosion-Werkstoffe Und Korrosion. 2010;61(1):51-57.
doi:10.1002/maco.200905246 .

Cekerevac, M. I., Romhanji, Endre, Cvijović, Zorica, Bujanović, L. N., "The influence of tin and silver as microstructure modifiers on the corrosion rate of Pb-Ca alloys in sulfuric acid solutions" in Materials and Corrosion-Werkstoffe Und Korrosion, 61, no. 1 (2010):51-57,
https://doi.org/10.1002/maco.200905246 . .

TY  - JOUR
AU  - Cvijović-Alagić, Ivana
AU  - Mitrović, Slobodan
AU  - Cvijović, Zorica
AU  - Veljović, Đorđe
AU  - Babić, Miroslav
AU  - Rakin, Marko
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1424
AB  - The influence of diverse heat treatments on micro-structural and tribological characteristics of Ti-6Al-4V ELI (mass%) alloy, which is used as implant material in biomedical engineering, was investigated on a block-on-disc tribometer. Aim of the present study was to explore the possibility of Ti-6Al-4V ELI alloy wear resistance improvement, examining the effects of different heat treatments on alloy microstructure, as well as on alloy wear characteristics in simulated body conditions using light optical microscopy (LOM) and scanning electron microscopy (SEM). Results presented in this paper show that the influence of heat treatment on micro-structural and tribological characteristics of the investigated Ti-based alloy is significant and that it can be used for further wear resistance improvement of this widely used implant material. .
PB  - Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac
T2  - Tribology in Industry
T1  - Influence of the heat treatment on the tribological characteristics of the Ti-based alloy for biomedical applications
EP  - 22
IS  - 3-4
SP  - 17
VL  - 31
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1424
ER  - 

@article{
author = "Cvijović-Alagić, Ivana and Mitrović, Slobodan and Cvijović, Zorica and Veljović, Đorđe and Babić, Miroslav and Rakin, Marko",
year = "2009",
abstract = "The influence of diverse heat treatments on micro-structural and tribological characteristics of Ti-6Al-4V ELI (mass%) alloy, which is used as implant material in biomedical engineering, was investigated on a block-on-disc tribometer. Aim of the present study was to explore the possibility of Ti-6Al-4V ELI alloy wear resistance improvement, examining the effects of different heat treatments on alloy microstructure, as well as on alloy wear characteristics in simulated body conditions using light optical microscopy (LOM) and scanning electron microscopy (SEM). Results presented in this paper show that the influence of heat treatment on micro-structural and tribological characteristics of the investigated Ti-based alloy is significant and that it can be used for further wear resistance improvement of this widely used implant material. .",
publisher = "Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac",
journal = "Tribology in Industry",
title = "Influence of the heat treatment on the tribological characteristics of the Ti-based alloy for biomedical applications",
pages = "22-17",
number = "3-4",
volume = "31",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1424"
}

Cvijović-Alagić, I., Mitrović, S., Cvijović, Z., Veljović, Đ., Babić, M.,& Rakin, M.. (2009). Influence of the heat treatment on the tribological characteristics of the Ti-based alloy for biomedical applications. in Tribology in Industry
Univerzitet u Kragujevcu - Fakultet inženjerskih nauka, Kragujevac., 31(3-4), 17-22.
https://hdl.handle.net/21.15107/rcub_technorep_1424

Cvijović-Alagić I, Mitrović S, Cvijović Z, Veljović Đ, Babić M, Rakin M. Influence of the heat treatment on the tribological characteristics of the Ti-based alloy for biomedical applications. in Tribology in Industry. 2009;31(3-4):17-22.
https://hdl.handle.net/21.15107/rcub_technorep_1424 .

Cvijović-Alagić, Ivana, Mitrović, Slobodan, Cvijović, Zorica, Veljović, Đorđe, Babić, Miroslav, Rakin, Marko, "Influence of the heat treatment on the tribological characteristics of the Ti-based alloy for biomedical applications" in Tribology in Industry, 31, no. 3-4 (2009):17-22,
https://hdl.handle.net/21.15107/rcub_technorep_1424 .

TY  - JOUR
AU  - Vratnica, Maja
AU  - Cvijović, Zorica
AU  - Radović, Nenad
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1203
AB  - To provide an understanding of how compositional variations affect the microstructural parameters associated with coarse intermetallic (IM) particles and the fracture toughness in AA 7000 aluminum forgings, a microstructural and fractographic analysis as well as mechanical tests were carried out on three industrially produced Al-Zn-Mg-Cu alloys with different contents of impurities (Fe+Si). Light optical microscopy and image analysis were used to assess the volume fraction, size and distribution of all the soluble and insoluble coarse ( gt  0.1 mu m) IM particles identified in the corresponding R-C and L-R planes for T73-type heat treatments by selective etching and energy-dispersive X-ray spectroscopy. These quantitative data were correlated with the plain-strain fracture toughness, K-IC, with the results being, used to produce useful information on alloy design and thermomechanical processing via microstructural control. The scanning electron microscope observation of fracture surface features and an estimation of the area fractions of different fracture modes in the plastic zone segments of a test specimen showed that multiple failure mechanisms occurred with coarse voiding at the intermetallics becoming more important as the fraction of coarse IM particles increases. A quantitative assessment of the relevant microstructural and fractographic parameters will be utilized for developing and verifying a multiple micromechanisms-based model for fracture toughness.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - The effect of compositional variations on the fracture toughness of 7000 al-alloys
EP  - 196
IS  - 5
SP  - 191
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1203
ER  - 

@article{
author = "Vratnica, Maja and Cvijović, Zorica and Radović, Nenad",
year = "2008",
abstract = "To provide an understanding of how compositional variations affect the microstructural parameters associated with coarse intermetallic (IM) particles and the fracture toughness in AA 7000 aluminum forgings, a microstructural and fractographic analysis as well as mechanical tests were carried out on three industrially produced Al-Zn-Mg-Cu alloys with different contents of impurities (Fe+Si). Light optical microscopy and image analysis were used to assess the volume fraction, size and distribution of all the soluble and insoluble coarse ( gt  0.1 mu m) IM particles identified in the corresponding R-C and L-R planes for T73-type heat treatments by selective etching and energy-dispersive X-ray spectroscopy. These quantitative data were correlated with the plain-strain fracture toughness, K-IC, with the results being, used to produce useful information on alloy design and thermomechanical processing via microstructural control. The scanning electron microscope observation of fracture surface features and an estimation of the area fractions of different fracture modes in the plastic zone segments of a test specimen showed that multiple failure mechanisms occurred with coarse voiding at the intermetallics becoming more important as the fraction of coarse IM particles increases. A quantitative assessment of the relevant microstructural and fractographic parameters will be utilized for developing and verifying a multiple micromechanisms-based model for fracture toughness.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "The effect of compositional variations on the fracture toughness of 7000 al-alloys",
pages = "196-191",
number = "5",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1203"
}

Vratnica, M., Cvijović, Z.,& Radović, N.. (2008). The effect of compositional variations on the fracture toughness of 7000 al-alloys. in Materiali in Tehnologije
Institute of Metals and Technology., 42(5), 191-196.
https://hdl.handle.net/21.15107/rcub_technorep_1203

Vratnica M, Cvijović Z, Radović N. The effect of compositional variations on the fracture toughness of 7000 al-alloys. in Materiali in Tehnologije. 2008;42(5):191-196.
https://hdl.handle.net/21.15107/rcub_technorep_1203 .

Vratnica, Maja, Cvijović, Zorica, Radović, Nenad, "The effect of compositional variations on the fracture toughness of 7000 al-alloys" in Materiali in Tehnologije, 42, no. 5 (2008):191-196,
https://hdl.handle.net/21.15107/rcub_technorep_1203 .

TY  - JOUR
AU  - Zrilić, Milorad
AU  - Rakin, Marko
AU  - Međo, Bojan
AU  - Cvijović, Zorica
AU  - Sedmak, Aleksandar
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1207
AB  - In the paper, the level of damage of steam pipeline steel after about 100,000 hours at 540 degrees C (1004 degrees F) under pressure of 42 bars (609 PSI) is analyzed. Material degradation is estimated using a combined experimental and numerical procedure based on micromechanical or local approach to fracture. Detailed analysis is conducted on the samples taken from exploited used steel and from unused new steel of the same designation. Damage parameter void growth ratio - is determined using round notched specimens, (including various notch radii). A comparison of the values for critical void growth ratio, computed for tested steels is made. Based on the values obtained, the possibility of prolongation of the operating life Of used steel is discussed.
PB  - ASME 2008 Pressure Vessels and Piping Conference, PVP2008
T2  - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
T1  - Evaluation of damage of steam pipeline steel using local approach to fracture
EP  - 12
SP  - 7
VL  - 7
DO  - 10.1115/PVP2008-61265
ER  - 

@article{
author = "Zrilić, Milorad and Rakin, Marko and Međo, Bojan and Cvijović, Zorica and Sedmak, Aleksandar",
year = "2008",
abstract = "In the paper, the level of damage of steam pipeline steel after about 100,000 hours at 540 degrees C (1004 degrees F) under pressure of 42 bars (609 PSI) is analyzed. Material degradation is estimated using a combined experimental and numerical procedure based on micromechanical or local approach to fracture. Detailed analysis is conducted on the samples taken from exploited used steel and from unused new steel of the same designation. Damage parameter void growth ratio - is determined using round notched specimens, (including various notch radii). A comparison of the values for critical void growth ratio, computed for tested steels is made. Based on the values obtained, the possibility of prolongation of the operating life Of used steel is discussed.",
publisher = "ASME 2008 Pressure Vessels and Piping Conference, PVP2008",
journal = "American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP",
title = "Evaluation of damage of steam pipeline steel using local approach to fracture",
pages = "12-7",
volume = "7",
doi = "10.1115/PVP2008-61265"
}

Zrilić, M., Rakin, M., Međo, B., Cvijović, Z.,& Sedmak, A.. (2008). Evaluation of damage of steam pipeline steel using local approach to fracture. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
ASME 2008 Pressure Vessels and Piping Conference, PVP2008., 7, 7-12.
https://doi.org/10.1115/PVP2008-61265

Zrilić M, Rakin M, Međo B, Cvijović Z, Sedmak A. Evaluation of damage of steam pipeline steel using local approach to fracture. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. 2008;7:7-12.
doi:10.1115/PVP2008-61265 .

Zrilić, Milorad, Rakin, Marko, Međo, Bojan, Cvijović, Zorica, Sedmak, Aleksandar, "Evaluation of damage of steam pipeline steel using local approach to fracture" in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, 7 (2008):7-12,
https://doi.org/10.1115/PVP2008-61265 . .

TY  - JOUR
AU  - Cvijović, Zorica
AU  - Vratnica, Maja
AU  - Rakin, Marko
AU  - Cvijović-Alagić, Ivana
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1292
AB  - An attempt has been made to model the plane-strain fracture toughness, KIc, in Al-Zn-Mg-Cu alloy forgings subjected to overageing. The proposed model, based on the multiple micromechanisms, reveals the quantitative relations between fracture toughness, fraction of all fracture modes and microstructural parameters associated with multiscale-sized second-phase particles and precipitate-free zones. The new model is validated by the present quantitative data of microstructural and fractographic analysis performed along with mechanical tests on hot-forged plates in T73 condition. The relevant parameters changed by the compositional variations were determined in two orientations. It was found that the predicted KIc values represent the tendency of fracture toughness change well. The new model provides better agreement for the case of dominant transgranular fracture mode.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Philosophical Magazine
T1  - Micromechanical model for fracture toughness prediction in Al-Zn-Mg-Cu alloy forgings
EP  - 3179
IS  - 27
SP  - 3153
VL  - 88
DO  - 10.1080/14786430802502559
ER  - 

@article{
author = "Cvijović, Zorica and Vratnica, Maja and Rakin, Marko and Cvijović-Alagić, Ivana",
year = "2008",
abstract = "An attempt has been made to model the plane-strain fracture toughness, KIc, in Al-Zn-Mg-Cu alloy forgings subjected to overageing. The proposed model, based on the multiple micromechanisms, reveals the quantitative relations between fracture toughness, fraction of all fracture modes and microstructural parameters associated with multiscale-sized second-phase particles and precipitate-free zones. The new model is validated by the present quantitative data of microstructural and fractographic analysis performed along with mechanical tests on hot-forged plates in T73 condition. The relevant parameters changed by the compositional variations were determined in two orientations. It was found that the predicted KIc values represent the tendency of fracture toughness change well. The new model provides better agreement for the case of dominant transgranular fracture mode.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Philosophical Magazine",
title = "Micromechanical model for fracture toughness prediction in Al-Zn-Mg-Cu alloy forgings",
pages = "3179-3153",
number = "27",
volume = "88",
doi = "10.1080/14786430802502559"
}

Cvijović, Z., Vratnica, M., Rakin, M.,& Cvijović-Alagić, I.. (2008). Micromechanical model for fracture toughness prediction in Al-Zn-Mg-Cu alloy forgings. in Philosophical Magazine
Taylor & Francis Ltd, Abingdon., 88(27), 3153-3179.
https://doi.org/10.1080/14786430802502559

Cvijović Z, Vratnica M, Rakin M, Cvijović-Alagić I. Micromechanical model for fracture toughness prediction in Al-Zn-Mg-Cu alloy forgings. in Philosophical Magazine. 2008;88(27):3153-3179.
doi:10.1080/14786430802502559 .

Cvijović, Zorica, Vratnica, Maja, Rakin, Marko, Cvijović-Alagić, Ivana, "Micromechanical model for fracture toughness prediction in Al-Zn-Mg-Cu alloy forgings" in Philosophical Magazine, 88, no. 27 (2008):3153-3179,
https://doi.org/10.1080/14786430802502559 . .

TY  - JOUR
AU  - Cvijović, Zorica
AU  - Rakin, Marko
AU  - Vratnica, Maja
AU  - Cvijović, Ivana
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1320
AB  - The effects of microstructural parameters associated with the coarse intermetallic phases particles and precipitates on the fracture toughness of the overaged 7000 alloy forgings are investigated. Detailed microstructural and fractographic analysis together with fracture toughness tests are carried out using three alloys with different (Fe + Si) contents. The fracture mechanisms are identified and area fractions of different fracture modes are assessed. The data are then quantitatively correlated to plane-strain fracture toughness, K-Ic, and the bulk microstructural attributes estimated via image analysis. A multiple micromechanism-based model is developed, which accurately describes the dependence of K-Ic on individual microstructural parameters.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Microstructural dependence of fracture toughness in high-strength 7000 forging alloys
EP  - 2129
IS  - 8
SP  - 2115
VL  - 75
DO  - 10.1016/j.engfracmech.2007.10.010
ER  - 

@article{
author = "Cvijović, Zorica and Rakin, Marko and Vratnica, Maja and Cvijović, Ivana",
year = "2008",
abstract = "The effects of microstructural parameters associated with the coarse intermetallic phases particles and precipitates on the fracture toughness of the overaged 7000 alloy forgings are investigated. Detailed microstructural and fractographic analysis together with fracture toughness tests are carried out using three alloys with different (Fe + Si) contents. The fracture mechanisms are identified and area fractions of different fracture modes are assessed. The data are then quantitatively correlated to plane-strain fracture toughness, K-Ic, and the bulk microstructural attributes estimated via image analysis. A multiple micromechanism-based model is developed, which accurately describes the dependence of K-Ic on individual microstructural parameters.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Microstructural dependence of fracture toughness in high-strength 7000 forging alloys",
pages = "2129-2115",
number = "8",
volume = "75",
doi = "10.1016/j.engfracmech.2007.10.010"
}

Cvijović, Z., Rakin, M., Vratnica, M.,& Cvijović, I.. (2008). Microstructural dependence of fracture toughness in high-strength 7000 forging alloys. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 75(8), 2115-2129.
https://doi.org/10.1016/j.engfracmech.2007.10.010

Cvijović Z, Rakin M, Vratnica M, Cvijović I. Microstructural dependence of fracture toughness in high-strength 7000 forging alloys. in Engineering Fracture Mechanics. 2008;75(8):2115-2129.
doi:10.1016/j.engfracmech.2007.10.010 .

Cvijović, Zorica, Rakin, Marko, Vratnica, Maja, Cvijović, Ivana, "Microstructural dependence of fracture toughness in high-strength 7000 forging alloys" in Engineering Fracture Mechanics, 75, no. 8 (2008):2115-2129,
https://doi.org/10.1016/j.engfracmech.2007.10.010 . .

TY  - JOUR
AU  - Cvijović, Zorica M.
AU  - Cvijović, Ivana
AU  - Vratnic, M.
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5490
AB  - Micromechanisms controlling the fracture damage in 7000 alloy forgings are studied for T73-type heat treatments. Insight into the fracture modes are obtained by varying the microstructural attributes associated with the coarse intermetallic (IM) particles and precipitates. To identify the fracture micromechanisms, extensive fractographic analysis by scanning electron microscopy (SEM) observation of the broken plane-strain fracture-toughness test specimen surfaces are carried out. The relative fractions of the various fracture modes as a function of microstructural features are quantitatively determined. The relationships between these data and values of fracture toughness are then established. It was found that multiple-fracture micromechanisms occur and the fracture toughness degradation is consistent with a change in the dominant fracture mode governed by variations in the alloy purity. (C) 2006 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Fracture micromechanisms in overaged 7000 alloy forgings
EP  - 75
IS  - 1-2
SP  - 66
VL  - 441
DO  - 10.1016/j.jallcom.2006.09.061
ER  - 

@article{
author = "Cvijović, Zorica M. and Cvijović, Ivana and Vratnic, M.",
year = "2007",
abstract = "Micromechanisms controlling the fracture damage in 7000 alloy forgings are studied for T73-type heat treatments. Insight into the fracture modes are obtained by varying the microstructural attributes associated with the coarse intermetallic (IM) particles and precipitates. To identify the fracture micromechanisms, extensive fractographic analysis by scanning electron microscopy (SEM) observation of the broken plane-strain fracture-toughness test specimen surfaces are carried out. The relative fractions of the various fracture modes as a function of microstructural features are quantitatively determined. The relationships between these data and values of fracture toughness are then established. It was found that multiple-fracture micromechanisms occur and the fracture toughness degradation is consistent with a change in the dominant fracture mode governed by variations in the alloy purity. (C) 2006 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Fracture micromechanisms in overaged 7000 alloy forgings",
pages = "75-66",
number = "1-2",
volume = "441",
doi = "10.1016/j.jallcom.2006.09.061"
}

Cvijović, Z. M., Cvijović, I.,& Vratnic, M.. (2007). Fracture micromechanisms in overaged 7000 alloy forgings. in Journal of Alloys and Compounds, 441(1-2), 66-75.
https://doi.org/10.1016/j.jallcom.2006.09.061

Cvijović ZM, Cvijović I, Vratnic M. Fracture micromechanisms in overaged 7000 alloy forgings. in Journal of Alloys and Compounds. 2007;441(1-2):66-75.
doi:10.1016/j.jallcom.2006.09.061 .

Cvijović, Zorica M., Cvijović, Ivana, Vratnic, M., "Fracture micromechanisms in overaged 7000 alloy forgings" in Journal of Alloys and Compounds, 441, no. 1-2 (2007):66-75,
https://doi.org/10.1016/j.jallcom.2006.09.061 . .

TY  - JOUR
AU  - Vratnica, Maja
AU  - Cvijović, Zorica
AU  - Rakin, Marko
AU  - Cvijović, Ivana
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1046
AB  - An attempt to develop a multiple micromechanism-based model for predicting plane-strain fracture toughness, KIc, of overaged 7000 alloy forgings has been made. The proposed model reveals the quantitative relations between the fracture toughness, fraction of the main fracture modes and parameters such as volume fraction, size and density of differently sized second-phase particles and precipitate-free zones. The new model is validated by the present quantitative data of microstructural and fractographic analysis performed along with mechanical tests on hot-forged plates subjected to the T73 temper. The relative parameters changed by the compositional variations were determined in the R-L and L-R orientations. It was found that the predicted KIc values well represent the tendency of fracture toughness change. The new model provides better agreement for the case of dominant transgranular fracture mode represented in the R-L orientation. .
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - A model for predicting fracture toughness in overaged 7000 alloy forgings
EP  - 300
IS  - 4
SP  - 293
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1046
ER  - 

@article{
author = "Vratnica, Maja and Cvijović, Zorica and Rakin, Marko and Cvijović, Ivana",
year = "2007",
abstract = "An attempt to develop a multiple micromechanism-based model for predicting plane-strain fracture toughness, KIc, of overaged 7000 alloy forgings has been made. The proposed model reveals the quantitative relations between the fracture toughness, fraction of the main fracture modes and parameters such as volume fraction, size and density of differently sized second-phase particles and precipitate-free zones. The new model is validated by the present quantitative data of microstructural and fractographic analysis performed along with mechanical tests on hot-forged plates subjected to the T73 temper. The relative parameters changed by the compositional variations were determined in the R-L and L-R orientations. It was found that the predicted KIc values well represent the tendency of fracture toughness change. The new model provides better agreement for the case of dominant transgranular fracture mode represented in the R-L orientation. .",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "A model for predicting fracture toughness in overaged 7000 alloy forgings",
pages = "300-293",
number = "4",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1046"
}

Vratnica, M., Cvijović, Z., Rakin, M.,& Cvijović, I.. (2007). A model for predicting fracture toughness in overaged 7000 alloy forgings. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 13(4), 293-300.
https://hdl.handle.net/21.15107/rcub_technorep_1046

Vratnica M, Cvijović Z, Rakin M, Cvijović I. A model for predicting fracture toughness in overaged 7000 alloy forgings. in Metalurgija. 2007;13(4):293-300.
https://hdl.handle.net/21.15107/rcub_technorep_1046 .

Vratnica, Maja, Cvijović, Zorica, Rakin, Marko, Cvijović, Ivana, "A model for predicting fracture toughness in overaged 7000 alloy forgings" in Metalurgija, 13, no. 4 (2007):293-300,
https://hdl.handle.net/21.15107/rcub_technorep_1046 .

TY  - JOUR
AU  - Zrilić, Milorad
AU  - Rakin, Marko
AU  - Sedmak, Aleksandar
AU  - Aleksić, R.
AU  - Cvijović, Zorica
AU  - Arsić, M.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5426
AB  - Considering the conditions to which steels used for the manufacture of steam pipelines are exposed, the micromechanism of their destruction in exploitation is exclusively the ductile one. In order to make an estimation of the level of the damage that occurs in exploitation, in this paper a combined experimental and numerical procedure has been developed based on micromechanical or local approach to the fracture mechanics of metallic materials. After the analysis of the results obtained for micromechanical criterion of failure for virgin steel and that used in the steam pipeline, a proposal for prolongation of the working life of tested steel for steam pipelines until the next overhaul is given.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Recent Developments in Advanced Materials and Processes
T1  - Ductile fracture prediction of steam pipeline steel
EP  - 542
SP  - 537
VL  - 518
DO  - 10.4028/www.scientific.net/MSF.518.537
ER  - 

@article{
author = "Zrilić, Milorad and Rakin, Marko and Sedmak, Aleksandar and Aleksić, R. and Cvijović, Zorica and Arsić, M.",
year = "2006",
abstract = "Considering the conditions to which steels used for the manufacture of steam pipelines are exposed, the micromechanism of their destruction in exploitation is exclusively the ductile one. In order to make an estimation of the level of the damage that occurs in exploitation, in this paper a combined experimental and numerical procedure has been developed based on micromechanical or local approach to the fracture mechanics of metallic materials. After the analysis of the results obtained for micromechanical criterion of failure for virgin steel and that used in the steam pipeline, a proposal for prolongation of the working life of tested steel for steam pipelines until the next overhaul is given.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Recent Developments in Advanced Materials and Processes",
title = "Ductile fracture prediction of steam pipeline steel",
pages = "542-537",
volume = "518",
doi = "10.4028/www.scientific.net/MSF.518.537"
}

Zrilić, M., Rakin, M., Sedmak, A., Aleksić, R., Cvijović, Z.,& Arsić, M.. (2006). Ductile fracture prediction of steam pipeline steel. in Recent Developments in Advanced Materials and Processes
Trans Tech Publications Ltd, Durnten-Zurich., 518, 537-542.
https://doi.org/10.4028/www.scientific.net/MSF.518.537

Zrilić M, Rakin M, Sedmak A, Aleksić R, Cvijović Z, Arsić M. Ductile fracture prediction of steam pipeline steel. in Recent Developments in Advanced Materials and Processes. 2006;518:537-542.
doi:10.4028/www.scientific.net/MSF.518.537 .

Zrilić, Milorad, Rakin, Marko, Sedmak, Aleksandar, Aleksić, R., Cvijović, Zorica, Arsić, M., "Ductile fracture prediction of steam pipeline steel" in Recent Developments in Advanced Materials and Processes, 518 (2006):537-542,
https://doi.org/10.4028/www.scientific.net/MSF.518.537 . .

TY  - CONF
AU  - Zrilić, Milorad
AU  - Rakin, Marko
AU  - Cvijović, Zorica
AU  - Sedmak, Aleksandar
AU  - Sedmak, S.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5459
PB  - Kluwer Academic Publishers
C3  - Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere
T1  - Structural integrity assessment by local approach to fracture
EP  - 1070
SP  - 1069
DO  - 10.1007/1-4020-4972-2_530
ER  - 

@conference{
author = "Zrilić, Milorad and Rakin, Marko and Cvijović, Zorica and Sedmak, Aleksandar and Sedmak, S.",
year = "2006",
publisher = "Kluwer Academic Publishers",
journal = "Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere",
title = "Structural integrity assessment by local approach to fracture",
pages = "1070-1069",
doi = "10.1007/1-4020-4972-2_530"
}

Zrilić, M., Rakin, M., Cvijović, Z., Sedmak, A.,& Sedmak, S.. (2006). Structural integrity assessment by local approach to fracture. in Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere
Kluwer Academic Publishers., 1069-1070.
https://doi.org/10.1007/1-4020-4972-2_530

Zrilić M, Rakin M, Cvijović Z, Sedmak A, Sedmak S. Structural integrity assessment by local approach to fracture. in Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere. 2006;:1069-1070.
doi:10.1007/1-4020-4972-2_530 .

Zrilić, Milorad, Rakin, Marko, Cvijović, Zorica, Sedmak, Aleksandar, Sedmak, S., "Structural integrity assessment by local approach to fracture" in Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere (2006):1069-1070,
https://doi.org/10.1007/1-4020-4972-2_530 . .

TY  - JOUR
AU  - Vratnica, M.
AU  - Cvijović, Zorica
AU  - Degische, H.P.
AU  - Requena, G.C.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5469
AB  - The effect of coarse intermetallic particles on the fracture process in 7000 alloy forgings was investigated using three alloys with different (Fe + Si) impurity levels. The intermetallic particles were identified by selective etching and energy dispersive spectroscopy analysis conducted on a scanning electron microscope. Their geometrical parameters were estimated by image analysis and then correlated with area fractions of different fracture modes on the broken fracture toughness test specimens. It was found that the dominant fracture mode varies with the (Fe + Si) content. The coarse voiding at large intermetallic particles increases systematically with an increase of the impurity level, which in turn increases the amount and size of particles containing Fe and Si while decreasing their spacing. That the crack nucleation and propagation are accelerated by these particles was revealed by in situ scanning electron microscopy observation of the fracture process.
PB  - Wiley-Blackwell
T2  - Journal of Microscopy
T1  - The effect of coarse intermetallic particles on the fracture process in forged 7000 alloys
EP  - 120
IS  - 1
SP  - 117
VL  - 224
DO  - 10.1111/j.1365-2818.2006.01683.x
ER  - 

@article{
author = "Vratnica, M. and Cvijović, Zorica and Degische, H.P. and Requena, G.C.",
year = "2006",
abstract = "The effect of coarse intermetallic particles on the fracture process in 7000 alloy forgings was investigated using three alloys with different (Fe + Si) impurity levels. The intermetallic particles were identified by selective etching and energy dispersive spectroscopy analysis conducted on a scanning electron microscope. Their geometrical parameters were estimated by image analysis and then correlated with area fractions of different fracture modes on the broken fracture toughness test specimens. It was found that the dominant fracture mode varies with the (Fe + Si) content. The coarse voiding at large intermetallic particles increases systematically with an increase of the impurity level, which in turn increases the amount and size of particles containing Fe and Si while decreasing their spacing. That the crack nucleation and propagation are accelerated by these particles was revealed by in situ scanning electron microscopy observation of the fracture process.",
publisher = "Wiley-Blackwell",
journal = "Journal of Microscopy",
title = "The effect of coarse intermetallic particles on the fracture process in forged 7000 alloys",
pages = "120-117",
number = "1",
volume = "224",
doi = "10.1111/j.1365-2818.2006.01683.x"
}

Vratnica, M., Cvijović, Z., Degische, H.P.,& Requena, G.C.. (2006). The effect of coarse intermetallic particles on the fracture process in forged 7000 alloys. in Journal of Microscopy
Wiley-Blackwell., 224(1), 117-120.
https://doi.org/10.1111/j.1365-2818.2006.01683.x

Vratnica M, Cvijović Z, Degische H, Requena G. The effect of coarse intermetallic particles on the fracture process in forged 7000 alloys. in Journal of Microscopy. 2006;224(1):117-120.
doi:10.1111/j.1365-2818.2006.01683.x .

Vratnica, M., Cvijović, Zorica, Degische, H.P., Requena, G.C., "The effect of coarse intermetallic particles on the fracture process in forged 7000 alloys" in Journal of Microscopy, 224, no. 1 (2006):117-120,
https://doi.org/10.1111/j.1365-2818.2006.01683.x . .

TY  - JOUR
AU  - Cvijović, Zorica
AU  - Radenković, G.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5452
AB  - The transition from metastable to stable pitting was studied in 0.5 M NaCl water solution for two cast duplex stainless steels under different microstructural conditions achieved by annealing in the range from 900 °C to 1200 °C. The ensuing microstructural changes in heat treated steels were defined and correlated with established pitting potentials (E p ) and sites of corrosion damage initiation. The variations in E p have been discussed in terms of secondary phases precipitation. The critical condition for pit stability was quantified and used to select an appropriate microstructural state, resulting in the higher potential at which stable pit growth is first observed.
PB  - Elsevier Ltd
T2  - Corrosion Science
T1  - Microstructure and pitting corrosion resistance of annealed duplex stainless steel
EP  - 3906
IS  - 12
SP  - 3887
VL  - 48
DO  - 10.1016/j.corsci.2006.04.003
ER  - 

@article{
author = "Cvijović, Zorica and Radenković, G.",
year = "2006",
abstract = "The transition from metastable to stable pitting was studied in 0.5 M NaCl water solution for two cast duplex stainless steels under different microstructural conditions achieved by annealing in the range from 900 °C to 1200 °C. The ensuing microstructural changes in heat treated steels were defined and correlated with established pitting potentials (E p ) and sites of corrosion damage initiation. The variations in E p have been discussed in terms of secondary phases precipitation. The critical condition for pit stability was quantified and used to select an appropriate microstructural state, resulting in the higher potential at which stable pit growth is first observed.",
publisher = "Elsevier Ltd",
journal = "Corrosion Science",
title = "Microstructure and pitting corrosion resistance of annealed duplex stainless steel",
pages = "3906-3887",
number = "12",
volume = "48",
doi = "10.1016/j.corsci.2006.04.003"
}

Cvijović, Z.,& Radenković, G.. (2006). Microstructure and pitting corrosion resistance of annealed duplex stainless steel. in Corrosion Science
Elsevier Ltd., 48(12), 3887-3906.
https://doi.org/10.1016/j.corsci.2006.04.003

Cvijović Z, Radenković G. Microstructure and pitting corrosion resistance of annealed duplex stainless steel. in Corrosion Science. 2006;48(12):3887-3906.
doi:10.1016/j.corsci.2006.04.003 .

Cvijović, Zorica, Radenković, G., "Microstructure and pitting corrosion resistance of annealed duplex stainless steel" in Corrosion Science, 48, no. 12 (2006):3887-3906,
https://doi.org/10.1016/j.corsci.2006.04.003 . .

TY  - JOUR
AU  - Cvijović, Zorica
AU  - Vratnica, M.
AU  - Rakin, M.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5451
AB  - In this article, a multiple micromechanisms-based model that quantitatively relates the plane-strain fracture toughness, KIC, of overaged 7000 alloy forgings to their microstructural attributes, fracture surface morphology and basic tensile properties is developed. To verify the proposed model, extensive microstructural and fractographic analyses along with mechanical tests are carried out using three industrially produced alloys with different contents of Fe and Si impurities. The fracture mechanisms are identified and individual contributions to the overall fracture are quantitatively assessed. The fracture toughness is then calculated using the experimentally obtained average values of relevant mechanical properties, area fractions of main fracture modes and microstructural parameters such as volume fraction of coarse intermetallic (IM) particles, their size and spacing, density of intragranular precipitates, number and width of the precipitate-free zones (PFZ). The proposed model correctly predicts the effect of individual microstructural parameters on the overall fracture behaviour.
PB  - Elsevier
T2  - Materials Science and Engineering A
T1  - Micromechanical modelling of fracture toughness in overaged 7000 alloy forgings
EP  - 346
IS  - 1-2
SP  - 339
VL  - 434
DO  - 10.1016/j.msea.2006.07.018
ER  - 

@article{
author = "Cvijović, Zorica and Vratnica, M. and Rakin, M.",
year = "2006",
abstract = "In this article, a multiple micromechanisms-based model that quantitatively relates the plane-strain fracture toughness, KIC, of overaged 7000 alloy forgings to their microstructural attributes, fracture surface morphology and basic tensile properties is developed. To verify the proposed model, extensive microstructural and fractographic analyses along with mechanical tests are carried out using three industrially produced alloys with different contents of Fe and Si impurities. The fracture mechanisms are identified and individual contributions to the overall fracture are quantitatively assessed. The fracture toughness is then calculated using the experimentally obtained average values of relevant mechanical properties, area fractions of main fracture modes and microstructural parameters such as volume fraction of coarse intermetallic (IM) particles, their size and spacing, density of intragranular precipitates, number and width of the precipitate-free zones (PFZ). The proposed model correctly predicts the effect of individual microstructural parameters on the overall fracture behaviour.",
publisher = "Elsevier",
journal = "Materials Science and Engineering A",
title = "Micromechanical modelling of fracture toughness in overaged 7000 alloy forgings",
pages = "346-339",
number = "1-2",
volume = "434",
doi = "10.1016/j.msea.2006.07.018"
}

Cvijović, Z., Vratnica, M.,& Rakin, M.. (2006). Micromechanical modelling of fracture toughness in overaged 7000 alloy forgings. in Materials Science and Engineering A
Elsevier., 434(1-2), 339-346.
https://doi.org/10.1016/j.msea.2006.07.018

Cvijović Z, Vratnica M, Rakin M. Micromechanical modelling of fracture toughness in overaged 7000 alloy forgings. in Materials Science and Engineering A. 2006;434(1-2):339-346.
doi:10.1016/j.msea.2006.07.018 .

Cvijović, Zorica, Vratnica, M., Rakin, M., "Micromechanical modelling of fracture toughness in overaged 7000 alloy forgings" in Materials Science and Engineering A, 434, no. 1-2 (2006):339-346,
https://doi.org/10.1016/j.msea.2006.07.018 . .

TY  - JOUR
AU  - Cvijović, Zorica M.
AU  - Radenković, Božidar
AU  - Maksimović, Vesna
AU  - Dimčić, Biljana
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5430
AB  - The Analysis of variance (ANOVA) method has been used to illustrate the implementation of adaptive numerical (AN) techniques for the prediction of the precipitation behaviour of commercial materials. Case studies involving the analysis of a-phase precipitation kinetics in duplex stainless steel (DSS) produced by sand casting and age hardening of 2219 alummium alloy microalloyed with Ge and/or Si are presented. For each alloy, complex datasets comprised the results obtained from heat treatment trials on a range of commercial processing conditions, so that a single and combined effect of various parameters can be determined. This enabled an estimate of the most influential parameters to be made, providing an effective means of commercial alloy development and process optimisation. (c) 2005 Elsevier B.V. All rights reserved.
T2  - Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
T1  - Application of ANOVA method to precipitation behaviour studies
EP  - 203
IS  - 1-2
SP  - 195
VL  - 397
DO  - 10.1016/j.msea.2005.02.021
ER  - 

@article{
author = "Cvijović, Zorica M. and Radenković, Božidar and Maksimović, Vesna and Dimčić, Biljana",
year = "2005",
abstract = "The Analysis of variance (ANOVA) method has been used to illustrate the implementation of adaptive numerical (AN) techniques for the prediction of the precipitation behaviour of commercial materials. Case studies involving the analysis of a-phase precipitation kinetics in duplex stainless steel (DSS) produced by sand casting and age hardening of 2219 alummium alloy microalloyed with Ge and/or Si are presented. For each alloy, complex datasets comprised the results obtained from heat treatment trials on a range of commercial processing conditions, so that a single and combined effect of various parameters can be determined. This enabled an estimate of the most influential parameters to be made, providing an effective means of commercial alloy development and process optimisation. (c) 2005 Elsevier B.V. All rights reserved.",
journal = "Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing",
title = "Application of ANOVA method to precipitation behaviour studies",
pages = "203-195",
number = "1-2",
volume = "397",
doi = "10.1016/j.msea.2005.02.021"
}

Cvijović, Z. M., Radenković, B., Maksimović, V.,& Dimčić, B.. (2005). Application of ANOVA method to precipitation behaviour studies. in Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 397(1-2), 195-203.
https://doi.org/10.1016/j.msea.2005.02.021

Cvijović ZM, Radenković B, Maksimović V, Dimčić B. Application of ANOVA method to precipitation behaviour studies. in Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing. 2005;397(1-2):195-203.
doi:10.1016/j.msea.2005.02.021 .

Cvijović, Zorica M., Radenković, Božidar, Maksimović, Vesna, Dimčić, Biljana, "Application of ANOVA method to precipitation behaviour studies" in Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 397, no. 1-2 (2005):195-203,
https://doi.org/10.1016/j.msea.2005.02.021 . .

TY  - CONF
AU  - Rakin, Marko
AU  - Sedmak, Aleksandar
AU  - Cvijović, Zorica
AU  - Zrilić, Milorad
AU  - Sedmak, Stojan
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5399
AB  - We present results of the combined design-theoretical investigation of the mechanism of crack growth at the onset of ductile fracture of NPP reactor pressure vessels. Micromechanical approach to the prediction of ductile fracture has been applied, according to which the volume fraction of voids in the deformed material is determined by the finite-element method. On the basis of CT-specimen tests and known damage parameters, determined for smooth spherical specimens, we propose a micromechanical criterion of crack growth initiation for ductile fracture.
C3  - Strength of Materials
T1  - Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel
EP  - 36
IS  - 1
SP  - 33
VL  - 36
DO  - 10.1023/B:STOM.0000020111.90136.97
ER  - 

@conference{
author = "Rakin, Marko and Sedmak, Aleksandar and Cvijović, Zorica and Zrilić, Milorad and Sedmak, Stojan",
year = "2004",
abstract = "We present results of the combined design-theoretical investigation of the mechanism of crack growth at the onset of ductile fracture of NPP reactor pressure vessels. Micromechanical approach to the prediction of ductile fracture has been applied, according to which the volume fraction of voids in the deformed material is determined by the finite-element method. On the basis of CT-specimen tests and known damage parameters, determined for smooth spherical specimens, we propose a micromechanical criterion of crack growth initiation for ductile fracture.",
journal = "Strength of Materials",
title = "Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel",
pages = "36-33",
number = "1",
volume = "36",
doi = "10.1023/B:STOM.0000020111.90136.97"
}

Rakin, M., Sedmak, A., Cvijović, Z., Zrilić, M.,& Sedmak, S.. (2004). Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel. in Strength of Materials, 36(1), 33-36.
https://doi.org/10.1023/B:STOM.0000020111.90136.97

Rakin M, Sedmak A, Cvijović Z, Zrilić M, Sedmak S. Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel. in Strength of Materials. 2004;36(1):33-36.
doi:10.1023/B:STOM.0000020111.90136.97 .

Rakin, Marko, Sedmak, Aleksandar, Cvijović, Zorica, Zrilić, Milorad, Sedmak, Stojan, "Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel" in Strength of Materials, 36, no. 1 (2004):33-36,
https://doi.org/10.1023/B:STOM.0000020111.90136.97 . .

TY  - JOUR
AU  - Rakin, Marko
AU  - Cvijović, Zorica
AU  - Grabulov, Vencislav
AU  - Putić, Slaviša
AU  - Sedmak, Aleksandar
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/614
AB  - In the paper ductile fracture initiation analysis of low-alloyed ferritic steel has been made by application of two micromechanical models: the Rice-Tracey void growth model and the Gurson-Tvergaard-Needleman (GTN) model. The aim of the study was to analyse transferability of micromechanical parameters determined on specimens without initial crack to pre-cracked specimens. A significant part of the research has been carried out through participation in the round robin project organised by the European Structural Integrity Society (ESIS). Tensile tests have been performed on cylindrical smooth specimens and CT specimens. Critical values of micromechanical parameters determined on smooth specimen for both applied models, have been used for prediction of the crack growth initiation in CT specimen. Modelling of the first phase of ductile fracture-void nucleation-has been carried out using quantitative metallographic analysis of non-metallic inclusion content in tested steel. For determination of critical values of model parameters corresponding to ductile fracture initiation a simple procedure has been applied based on a combination of experimental and numerical results. Evaluated J-integral values corresponding to onset of crack growth, J(i), are in good agreement with experimental result and both models have proved to be suitable for determination of the ductile fracture initiation in tested steel. The effect of FE size at a crack tip on J(i)-value has been particularly analysed: it has been established that the calculation with FE size corresponding to the mean free path), between inclusions in steel gives results that are in accordance with the experimental ones.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Prediction of ductile fracture initiation using micromechanical analysis
EP  - 827
IS  - 4-6
SP  - 813
VL  - 71
DO  - 10.1016/S0013-7944(03)00013-4
ER  - 

@article{
author = "Rakin, Marko and Cvijović, Zorica and Grabulov, Vencislav and Putić, Slaviša and Sedmak, Aleksandar",
year = "2004",
abstract = "In the paper ductile fracture initiation analysis of low-alloyed ferritic steel has been made by application of two micromechanical models: the Rice-Tracey void growth model and the Gurson-Tvergaard-Needleman (GTN) model. The aim of the study was to analyse transferability of micromechanical parameters determined on specimens without initial crack to pre-cracked specimens. A significant part of the research has been carried out through participation in the round robin project organised by the European Structural Integrity Society (ESIS). Tensile tests have been performed on cylindrical smooth specimens and CT specimens. Critical values of micromechanical parameters determined on smooth specimen for both applied models, have been used for prediction of the crack growth initiation in CT specimen. Modelling of the first phase of ductile fracture-void nucleation-has been carried out using quantitative metallographic analysis of non-metallic inclusion content in tested steel. For determination of critical values of model parameters corresponding to ductile fracture initiation a simple procedure has been applied based on a combination of experimental and numerical results. Evaluated J-integral values corresponding to onset of crack growth, J(i), are in good agreement with experimental result and both models have proved to be suitable for determination of the ductile fracture initiation in tested steel. The effect of FE size at a crack tip on J(i)-value has been particularly analysed: it has been established that the calculation with FE size corresponding to the mean free path), between inclusions in steel gives results that are in accordance with the experimental ones.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Prediction of ductile fracture initiation using micromechanical analysis",
pages = "827-813",
number = "4-6",
volume = "71",
doi = "10.1016/S0013-7944(03)00013-4"
}

Rakin, M., Cvijović, Z., Grabulov, V., Putić, S.,& Sedmak, A.. (2004). Prediction of ductile fracture initiation using micromechanical analysis. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 71(4-6), 813-827.
https://doi.org/10.1016/S0013-7944(03)00013-4

Rakin M, Cvijović Z, Grabulov V, Putić S, Sedmak A. Prediction of ductile fracture initiation using micromechanical analysis. in Engineering Fracture Mechanics. 2004;71(4-6):813-827.
doi:10.1016/S0013-7944(03)00013-4 .

Rakin, Marko, Cvijović, Zorica, Grabulov, Vencislav, Putić, Slaviša, Sedmak, Aleksandar, "Prediction of ductile fracture initiation using micromechanical analysis" in Engineering Fracture Mechanics, 71, no. 4-6 (2004):813-827,
https://doi.org/10.1016/S0013-7944(03)00013-4 . .

TY  - JOUR
AU  - Rakin, Marko
AU  - Cvijović, Zorica
AU  - Sedmak, Aleksandar
AU  - Sedmak, S
PY  - 2002
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5371
AB  - For the description of the mechanical behavior of a cracked material, we use a macromechanical model of fracture based on the well-known criterion of plastic yield for porous materials. This model is realized as a computational scheme with the help of the finite-element method. The critical values of the micromechanical parameters of damage are experimentally measured and numerically evaluated for smooth specimens with an aim to predict the onset of plastic yield in a compact cracked specimen. For a low-alloy pressure-vessel steel considered as an example, we show that the proposed micromechanical model can be used for the prediction of the onset of fracture processes in both smooth and compact specimens.
PB  - Springer, New York
T2  - Materials Science
T1  - Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation
EP  - 113
IS  - 1
SP  - 104
VL  - 38
DO  - 10.1023/A:1020185001499
ER  - 

@article{
author = "Rakin, Marko and Cvijović, Zorica and Sedmak, Aleksandar and Sedmak, S",
year = "2002",
abstract = "For the description of the mechanical behavior of a cracked material, we use a macromechanical model of fracture based on the well-known criterion of plastic yield for porous materials. This model is realized as a computational scheme with the help of the finite-element method. The critical values of the micromechanical parameters of damage are experimentally measured and numerically evaluated for smooth specimens with an aim to predict the onset of plastic yield in a compact cracked specimen. For a low-alloy pressure-vessel steel considered as an example, we show that the proposed micromechanical model can be used for the prediction of the onset of fracture processes in both smooth and compact specimens.",
publisher = "Springer, New York",
journal = "Materials Science",
title = "Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation",
pages = "113-104",
number = "1",
volume = "38",
doi = "10.1023/A:1020185001499"
}

Rakin, M., Cvijović, Z., Sedmak, A.,& Sedmak, S.. (2002). Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation. in Materials Science
Springer, New York., 38(1), 104-113.
https://doi.org/10.1023/A:1020185001499

Rakin M, Cvijović Z, Sedmak A, Sedmak S. Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation. in Materials Science. 2002;38(1):104-113.
doi:10.1023/A:1020185001499 .

Rakin, Marko, Cvijović, Zorica, Sedmak, Aleksandar, Sedmak, S, "Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation" in Materials Science, 38, no. 1 (2002):104-113,
https://doi.org/10.1023/A:1020185001499 . .