TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Stanković, Miloš
AU  - Hvizdoš, Pavol
AU  - Bobić, Biljana
AU  - Stojanović, Blaža
AU  - Franek, Friedrich
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3437
AB  - Metal matrix composites are very inhomogeneous materials, and their properties depend on various parameters (production process, constituents, their interfaces, etc.). The influence of SiC microparticles (40 mu m) reinforcement and graphite macroparticles (200-800 mu m) addition on the mechanical properties of Al-Si A356 alloy, produced by compocasting, has been assessed using macro- and nanoscale measurements of hardness and modulus of elasticity. The Al makes over 90 wt% of the A356 alloy, so the nanoscale measurements were performed on different alpha phase regions on each material (core of alpha phase, eutectic alpha phase, and alpha phase near the phase boundaries alpha phase/secondary phases). The results showed that there is no direct correlation between mechanical properties on macro- and nanoscale. The nanoscale results also showed that the secondary phases (SiC and graphite particles) can have significant effect on the mechanical properties on the atomic level, i.e. in the alpha phase regions very close to the secondary phases.
PB  - Springer
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale
VL  - 42
IS  - 3
SP  - 115
DO  - 10.1007/s40430-020-2197-6
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Stanković, Miloš and Hvizdoš, Pavol and Bobić, Biljana and Stojanović, Blaža and Franek, Friedrich",
year = "2020",
abstract = "Metal matrix composites are very inhomogeneous materials, and their properties depend on various parameters (production process, constituents, their interfaces, etc.). The influence of SiC microparticles (40 mu m) reinforcement and graphite macroparticles (200-800 mu m) addition on the mechanical properties of Al-Si A356 alloy, produced by compocasting, has been assessed using macro- and nanoscale measurements of hardness and modulus of elasticity. The Al makes over 90 wt% of the A356 alloy, so the nanoscale measurements were performed on different alpha phase regions on each material (core of alpha phase, eutectic alpha phase, and alpha phase near the phase boundaries alpha phase/secondary phases). The results showed that there is no direct correlation between mechanical properties on macro- and nanoscale. The nanoscale results also showed that the secondary phases (SiC and graphite particles) can have significant effect on the mechanical properties on the atomic level, i.e. in the alpha phase regions very close to the secondary phases.",
publisher = "Springer",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale",
volume = "42",
number = "3",
pages = "115",
doi = "10.1007/s40430-020-2197-6"
}

Vencl, A., Bobić, I., Stanković, M., Hvizdoš, P., Bobić, B., Stojanović, B.,& Franek, F.. (2020). Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale. in Journal of the Brazilian Society of Mechanical Sciences and Engineering
Springer., 42(3), 115.
https://doi.org/10.1007/s40430-020-2197-6

Vencl A, Bobić I, Stanković M, Hvizdoš P, Bobić B, Stojanović B, Franek F. Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2020;42(3):115.
doi:10.1007/s40430-020-2197-6 .

Vencl, Aleksandar, Bobić, Ilija, Stanković, Miloš, Hvizdoš, Pavol, Bobić, Biljana, Stojanović, Blaža, Franek, Friedrich, "Influence of secondary phases in A356 MMCs on their mechanical properties at macro- and nanoscale" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42, no. 3 (2020):115,
https://doi.org/10.1007/s40430-020-2197-6 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Vučetić, Filip
AU  - Bobić, Biljana
AU  - Pitel, Jan
AU  - Bobić, Ilija
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2393
AB  - The influence of SiC microparticles reinforcement and graphite macroparticles addition on the friction and wear characteristics of A356 Al-Si alloys, produced by compocasting, has been assessed using a pin-on-disc tribometer. The incorporation of SiC reinforcement increased the coefficient of friction and reduced the wear. The addition of graphite did not reduce the coefficient of friction. In the case of hybrid composite with 1 wt% graphite, wear was more or less the same as with SiC reinforced composite, while in the case of hybrid composite with 3 wt% graphite, wear was further reduced. On the worn surfaces of hybrid composites, the presence of the discontinuous mixed surface layer, containing graphite and transferred counter-body material, was noticed.
PB  - Springer London
T2  - International Journal of Advanced Manufacturing Technology
T1  - Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles
VL  - 100
IS  - 9-12
SP  - 2135
EP  - 2146
DO  - 10.1007/s00170-018-2866-0
ER  - 

@article{
author = "Vencl, Aleksandar and Vučetić, Filip and Bobić, Biljana and Pitel, Jan and Bobić, Ilija",
year = "2019",
abstract = "The influence of SiC microparticles reinforcement and graphite macroparticles addition on the friction and wear characteristics of A356 Al-Si alloys, produced by compocasting, has been assessed using a pin-on-disc tribometer. The incorporation of SiC reinforcement increased the coefficient of friction and reduced the wear. The addition of graphite did not reduce the coefficient of friction. In the case of hybrid composite with 1 wt% graphite, wear was more or less the same as with SiC reinforced composite, while in the case of hybrid composite with 3 wt% graphite, wear was further reduced. On the worn surfaces of hybrid composites, the presence of the discontinuous mixed surface layer, containing graphite and transferred counter-body material, was noticed.",
publisher = "Springer London",
journal = "International Journal of Advanced Manufacturing Technology",
title = "Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles",
volume = "100",
number = "9-12",
pages = "2135-2146",
doi = "10.1007/s00170-018-2866-0"
}

Vencl, A., Vučetić, F., Bobić, B., Pitel, J.,& Bobić, I.. (2019). Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles. in International Journal of Advanced Manufacturing Technology
Springer London., 100(9-12), 2135-2146.
https://doi.org/10.1007/s00170-018-2866-0

Vencl A, Vučetić F, Bobić B, Pitel J, Bobić I. Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles. in International Journal of Advanced Manufacturing Technology. 2019;100(9-12):2135-2146.
doi:10.1007/s00170-018-2866-0 .

Vencl, Aleksandar, Vučetić, Filip, Bobić, Biljana, Pitel, Jan, Bobić, Ilija, "Tribological characterisation in dry sliding conditions of compocasted hybrid A356/SiCp/Grp composites with graphite macroparticles" in International Journal of Advanced Manufacturing Technology, 100, no. 9-12 (2019):2135-2146,
https://doi.org/10.1007/s00170-018-2866-0 . .

TY  - JOUR
AU  - Bobić, Ilija
AU  - Jegdić, Bore
AU  - Bobić, Biljana
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3457
AB  - The resistance to corrosion of the series of zinc-aluminum casting alloys modified with silicon and
strontium was studied in a sodium chloride solution. It was shown that general corrosion was the
main form of corrosion of Zn25Al-Si-Sr alloys in the test solution. The corrosion process takes
place through the anodic dissolution of the alloys, while the cathodic reaction is controlled by
diffusion of oxygen in the test solution. Three different electrochemical techniques were applied to
determine the corrosion current density, which is the electrochemical indicator of corrosion rate.
The value of corrosion current density for each Zn25Al-Si-Sr alloy was calculated using the value
of polarization resistance, obtained by electrochemical impedance spectroscopy or by linear
polarization resistance technique. The value of corrosion current density was also determined
directly from Tafel plots, which were recorded by linear sweep voltammetry. As the content of
silicon and strontium in the tested alloys increases, the value of corrosion current density
increases gradually. The results obtained by different electrochemical techniques are in good
agreement
AB  - Otpornost na koroziju serije legura cink-aluminijum za livenje, koje su modifikovane silicijumom i stroncijumom, ispitana je u rastvoru natrijum hlorida. Pokazano je da je opšta korozija glavni oblik korozije Zn25Al-Si-Sr legura u navedenom rastvoru. Proces korozije odvija se kao anodno rastvaranje legura, dok je katodna reakcija kontrolisana difuzijom kiseonika u rastvoru. Tri različite elektrohemijske tehnike primenjene su za određivanje gustine struje korozije, koja je elektrohemijski pokazatelj brzine korozije. Vrednost gustine struje korozije za svaku Zn25Al-Si-Sr leguru izračunata je na osnovu vrednosti polarizacione otpornosti, koja je određenai spektroskopijom elektrohemijske impedanse ili tehnikom linearne polarizacije. Vrednost gustine struje korozije je takođe određena direktno iz Tafelovih dijagrama, koji su registrovani pomoću voltametrije sa linearnom promenom potencijala. Sa povećanjem sadržaja silicijuma i stroncijuma u ispitivanim legurama vrednost gustine struje korozije postepeno raste. Rezultati dobijeni različitim elektrohemijskim tehnikama su u dobroj saglasnost
PB  - Belgrade : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - The resistance to general corrosion of series of zinc-aluminum alloys modified with silicon and strontiumloys modified with silicon and strontium
T1  - Otpornost na opštu koroziju serije legura cink-aluminijum koje su modifikovane silicijumom i stroncijumom
VL  - 60
IS  - 1
SP  - 18
EP  - 25
DO  - 10.5937/zasmat1901018B
ER  - 

@article{
author = "Bobić, Ilija and Jegdić, Bore and Bobić, Biljana",
year = "2019",
abstract = "The resistance to corrosion of the series of zinc-aluminum casting alloys modified with silicon and
strontium was studied in a sodium chloride solution. It was shown that general corrosion was the
main form of corrosion of Zn25Al-Si-Sr alloys in the test solution. The corrosion process takes
place through the anodic dissolution of the alloys, while the cathodic reaction is controlled by
diffusion of oxygen in the test solution. Three different electrochemical techniques were applied to
determine the corrosion current density, which is the electrochemical indicator of corrosion rate.
The value of corrosion current density for each Zn25Al-Si-Sr alloy was calculated using the value
of polarization resistance, obtained by electrochemical impedance spectroscopy or by linear
polarization resistance technique. The value of corrosion current density was also determined
directly from Tafel plots, which were recorded by linear sweep voltammetry. As the content of
silicon and strontium in the tested alloys increases, the value of corrosion current density
increases gradually. The results obtained by different electrochemical techniques are in good
agreement, Otpornost na koroziju serije legura cink-aluminijum za livenje, koje su modifikovane silicijumom i stroncijumom, ispitana je u rastvoru natrijum hlorida. Pokazano je da je opšta korozija glavni oblik korozije Zn25Al-Si-Sr legura u navedenom rastvoru. Proces korozije odvija se kao anodno rastvaranje legura, dok je katodna reakcija kontrolisana difuzijom kiseonika u rastvoru. Tri različite elektrohemijske tehnike primenjene su za određivanje gustine struje korozije, koja je elektrohemijski pokazatelj brzine korozije. Vrednost gustine struje korozije za svaku Zn25Al-Si-Sr leguru izračunata je na osnovu vrednosti polarizacione otpornosti, koja je određenai spektroskopijom elektrohemijske impedanse ili tehnikom linearne polarizacije. Vrednost gustine struje korozije je takođe određena direktno iz Tafelovih dijagrama, koji su registrovani pomoću voltametrije sa linearnom promenom potencijala. Sa povećanjem sadržaja silicijuma i stroncijuma u ispitivanim legurama vrednost gustine struje korozije postepeno raste. Rezultati dobijeni različitim elektrohemijskim tehnikama su u dobroj saglasnost",
publisher = "Belgrade : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "The resistance to general corrosion of series of zinc-aluminum alloys modified with silicon and strontiumloys modified with silicon and strontium, Otpornost na opštu koroziju serije legura cink-aluminijum koje su modifikovane silicijumom i stroncijumom",
volume = "60",
number = "1",
pages = "18-25",
doi = "10.5937/zasmat1901018B"
}

Bobić, I., Jegdić, B.,& Bobić, B.. (2019). The resistance to general corrosion of series of zinc-aluminum alloys modified with silicon and strontiumloys modified with silicon and strontium. in Zaštita materijala
Belgrade : Engineering Society for Corrosion., 60(1), 18-25.
https://doi.org/10.5937/zasmat1901018B

Bobić I, Jegdić B, Bobić B. The resistance to general corrosion of series of zinc-aluminum alloys modified with silicon and strontiumloys modified with silicon and strontium. in Zaštita materijala. 2019;60(1):18-25.
doi:10.5937/zasmat1901018B .

Bobić, Ilija, Jegdić, Bore, Bobić, Biljana, "The resistance to general corrosion of series of zinc-aluminum alloys modified with silicon and strontiumloys modified with silicon and strontium" in Zaštita materijala, 60, no. 1 (2019):18-25,
https://doi.org/10.5937/zasmat1901018B . .

TY  - JOUR
AU  - Bobić, Biljana
AU  - Vencl, Aleksandar
AU  - Ružić, Jovana
AU  - Bobić, Ilija
AU  - Damnjanović, Zvonko
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3648
AB  - Particulate nanocomposites with the base of ZA27 alloy were synthesized using an innovative route, which includes mechanical milling and compocasting. Scrap from the matrix alloy and ceramic nanoreinforcements were mechanically milled using the ball-milling technique, which led to the formation of composite microparticles. The use of these particles in the compocasting process provided better wettability of ceramic nanoreinforcements in the semi-solid metal matrix, which resulted in a relatively good dispersion of the nanoreinforcements in nanocomposite castings. The presence of nanoreinforcements led to the grain refinement in the matrix of nanocomposites. The mechanical properties of the synthesized nanocomposites are improved and compared with the properties of the metal matrix. The observed increase in the hardness of nanocomposites with Al2O3 nanoreinforcements (20–30 nm) was 6.5% to 10.8%, while the yield strength of these nanocomposites has increased by 12.2% to 23.2%. The hardness and compressive yield strength of the nanocomposites with Al2O3 nanoparticles (100 nm) increased by 1.7% to 8.0% and 2.3% to 8.3%, respectively. The increase in hardness of the nanocomposites with SiC nanoparticles (50 nm) was 11.5% to 20.6%, while the increase in the yield strength was 15.6% to 24.5%. The greatest contribution to the overall strengthening in the synthesized nanocomposites is the result of increased dislocation density due to the difference in coefficients of thermal expansion for the matrix alloy and nanoreinforcements.
PB  - Sage Publishing
T2  - Journal of Composite Materials
T1  - Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting
VL  - 53
IS  - 15
SP  - 2033
EP  - 2046
DO  - 10.1177/0021998318817876
ER  - 

@article{
author = "Bobić, Biljana and Vencl, Aleksandar and Ružić, Jovana and Bobić, Ilija and Damnjanović, Zvonko",
year = "2019",
abstract = "Particulate nanocomposites with the base of ZA27 alloy were synthesized using an innovative route, which includes mechanical milling and compocasting. Scrap from the matrix alloy and ceramic nanoreinforcements were mechanically milled using the ball-milling technique, which led to the formation of composite microparticles. The use of these particles in the compocasting process provided better wettability of ceramic nanoreinforcements in the semi-solid metal matrix, which resulted in a relatively good dispersion of the nanoreinforcements in nanocomposite castings. The presence of nanoreinforcements led to the grain refinement in the matrix of nanocomposites. The mechanical properties of the synthesized nanocomposites are improved and compared with the properties of the metal matrix. The observed increase in the hardness of nanocomposites with Al2O3 nanoreinforcements (20–30 nm) was 6.5% to 10.8%, while the yield strength of these nanocomposites has increased by 12.2% to 23.2%. The hardness and compressive yield strength of the nanocomposites with Al2O3 nanoparticles (100 nm) increased by 1.7% to 8.0% and 2.3% to 8.3%, respectively. The increase in hardness of the nanocomposites with SiC nanoparticles (50 nm) was 11.5% to 20.6%, while the increase in the yield strength was 15.6% to 24.5%. The greatest contribution to the overall strengthening in the synthesized nanocomposites is the result of increased dislocation density due to the difference in coefficients of thermal expansion for the matrix alloy and nanoreinforcements.",
publisher = "Sage Publishing",
journal = "Journal of Composite Materials",
title = "Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting",
volume = "53",
number = "15",
pages = "2033-2046",
doi = "10.1177/0021998318817876"
}

Bobić, B., Vencl, A., Ružić, J., Bobić, I.,& Damnjanović, Z.. (2019). Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting. in Journal of Composite Materials
Sage Publishing., 53(15), 2033-2046.
https://doi.org/10.1177/0021998318817876

Bobić B, Vencl A, Ružić J, Bobić I, Damnjanović Z. Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting. in Journal of Composite Materials. 2019;53(15):2033-2046.
doi:10.1177/0021998318817876 .

Bobić, Biljana, Vencl, Aleksandar, Ružić, Jovana, Bobić, Ilija, Damnjanović, Zvonko, "Microstructural and basic mechanical characteristics of ZA27 alloy-based nanocomposites synthesized by mechanical milling and compocasting" in Journal of Composite Materials, 53, no. 15 (2019):2033-2046,
https://doi.org/10.1177/0021998318817876 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Biljana
AU  - Vučetić, Filip
AU  - Svoboda, Petr
AU  - Popović, Vladimir
AU  - Bobić, Ilija
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2370
AB  - Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix.
PB  - Springer Heidelberg, Heidelberg
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy
VL  - 40
IS  - 11
DO  - 10.1007/s40430-018-1441-9
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Biljana and Vučetić, Filip and Svoboda, Petr and Popović, Vladimir and Bobić, Ilija",
year = "2018",
abstract = "Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy",
volume = "40",
number = "11",
doi = "10.1007/s40430-018-1441-9"
}

Vencl, A., Bobić, B., Vučetić, F., Svoboda, P., Popović, V.,& Bobić, I.. (2018). Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. in Journal of the Brazilian Society of Mechanical Sciences and Engineering
Springer Heidelberg, Heidelberg., 40(11).
https://doi.org/10.1007/s40430-018-1441-9

Vencl A, Bobić B, Vučetić F, Svoboda P, Popović V, Bobić I. Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2018;40(11).
doi:10.1007/s40430-018-1441-9 .

Vencl, Aleksandar, Bobić, Biljana, Vučetić, Filip, Svoboda, Petr, Popović, Vladimir, Bobić, Ilija, "Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, no. 11 (2018),
https://doi.org/10.1007/s40430-018-1441-9 . .

TY  - JOUR
AU  - Bobić, Biljana
AU  - Bajat, Jelena
AU  - Bobić, Ilija
AU  - Jegdić, Bore
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3650
AB  - The influence of corrosion on the surface appearance and microstructure of particulate ZA27/SiCp composites was examined after 30 d immersion in a sodium chloride solution with the access of atmospheric oxygen. The composites with different contents of SiC micro-particles were synthesized via compo casting. Microstructural studies by means of optical microscopy (OM) and scanning electron microscopy (SEM) showed that corrosion occurred in the composite matrices, preferentially in regions of the η phase, rich in zinc. The corrosion processes did not affect the silicon carbide particles incorporated in the matrix alloy. According to the results of electrochemical polarization measurements, an increase in the content of SiC particles in the composite matrice has led to the lower corrosion resistance in the composites.
PB  - Elsevier
T2  - Transactions of Nonferrous Metals Society of China (English Edition)
T1  - Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution
VL  - 26
IS  - 6
SP  - 1512
EP  - 1521
DO  - 10.1016/S1003-6326(16)64257-7
ER  - 

@article{
author = "Bobić, Biljana and Bajat, Jelena and Bobić, Ilija and Jegdić, Bore",
year = "2016",
abstract = "The influence of corrosion on the surface appearance and microstructure of particulate ZA27/SiCp composites was examined after 30 d immersion in a sodium chloride solution with the access of atmospheric oxygen. The composites with different contents of SiC micro-particles were synthesized via compo casting. Microstructural studies by means of optical microscopy (OM) and scanning electron microscopy (SEM) showed that corrosion occurred in the composite matrices, preferentially in regions of the η phase, rich in zinc. The corrosion processes did not affect the silicon carbide particles incorporated in the matrix alloy. According to the results of electrochemical polarization measurements, an increase in the content of SiC particles in the composite matrice has led to the lower corrosion resistance in the composites.",
publisher = "Elsevier",
journal = "Transactions of Nonferrous Metals Society of China (English Edition)",
title = "Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution",
volume = "26",
number = "6",
pages = "1512-1521",
doi = "10.1016/S1003-6326(16)64257-7"
}

Bobić, B., Bajat, J., Bobić, I.,& Jegdić, B.. (2016). Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution. in Transactions of Nonferrous Metals Society of China (English Edition)
Elsevier., 26(6), 1512-1521.
https://doi.org/10.1016/S1003-6326(16)64257-7

Bobić B, Bajat J, Bobić I, Jegdić B. Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution. in Transactions of Nonferrous Metals Society of China (English Edition). 2016;26(6):1512-1521.
doi:10.1016/S1003-6326(16)64257-7 .

Bobić, Biljana, Bajat, Jelena, Bobić, Ilija, Jegdić, Bore, "Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution" in Transactions of Nonferrous Metals Society of China (English Edition), 26, no. 6 (2016):1512-1521,
https://doi.org/10.1016/S1003-6326(16)64257-7 . .

TY  - JOUR
AU  - Bobić, Biljana
AU  - Bobić, Ilija
AU  - Vencl, Aleksandar
AU  - Babić, Miroslav
AU  - Mitrovic, Slobodan
PY  - 2016
UR  - http://www.tribology.rs/journals/2016/2016-1.html
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3652
AB  - The corrosion behavior of particulate ZA27/SiCp composites in an aerated sodium chloride solution was studied. The composites were synthesized via compocasting with addition of 1, 3 and 5 wt.% SiC particles in the matrix alloy. Composite samples were immersed for 30 days in the 3.5 wt.% NaCl solution open to the atmospheric air. Surface appearance and microstructure of the composites were examined by means of optical microscopy and scanning electron microscopy, while corrosion rates of the composites were determined using the weight loss method. It was revealed that SiC particles were not influenced by corrosion. General uniform corrosion occurred in the composite matrices, mainly in the region of the η phase. Local corrosion was noticed in micro-cracks and near clusters of particulate reinforcements. Results of microstructural examinations and immersion test indicate a slightly lower corrosion resistance of the ZA27/SiCp composites compared to that of the matrix alloy.
PB  - Serbia : University of Kragujevac
T2  - Tribology in Industry
T1  - Corrosion behavior of compocasted ZA27/SiCp composites in sodium chloride solution
VL  - 38
IS  - 1
SP  - 115
EP  - 120
UR  - https://hdl.handle.net/21.15107/rcub_cer_3652
ER  - 

@article{
author = "Bobić, Biljana and Bobić, Ilija and Vencl, Aleksandar and Babić, Miroslav and Mitrovic, Slobodan",
year = "2016",
abstract = "The corrosion behavior of particulate ZA27/SiCp composites in an aerated sodium chloride solution was studied. The composites were synthesized via compocasting with addition of 1, 3 and 5 wt.% SiC particles in the matrix alloy. Composite samples were immersed for 30 days in the 3.5 wt.% NaCl solution open to the atmospheric air. Surface appearance and microstructure of the composites were examined by means of optical microscopy and scanning electron microscopy, while corrosion rates of the composites were determined using the weight loss method. It was revealed that SiC particles were not influenced by corrosion. General uniform corrosion occurred in the composite matrices, mainly in the region of the η phase. Local corrosion was noticed in micro-cracks and near clusters of particulate reinforcements. Results of microstructural examinations and immersion test indicate a slightly lower corrosion resistance of the ZA27/SiCp composites compared to that of the matrix alloy.",
publisher = "Serbia : University of Kragujevac",
journal = "Tribology in Industry",
title = "Corrosion behavior of compocasted ZA27/SiCp composites in sodium chloride solution",
volume = "38",
number = "1",
pages = "115-120",
url = "https://hdl.handle.net/21.15107/rcub_cer_3652"
}

Bobić, B., Bobić, I., Vencl, A., Babić, M.,& Mitrovic, S.. (2016). Corrosion behavior of compocasted ZA27/SiCp composites in sodium chloride solution. in Tribology in Industry
Serbia : University of Kragujevac., 38(1), 115-120.
https://hdl.handle.net/21.15107/rcub_cer_3652

Bobić B, Bobić I, Vencl A, Babić M, Mitrovic S. Corrosion behavior of compocasted ZA27/SiCp composites in sodium chloride solution. in Tribology in Industry. 2016;38(1):115-120.
https://hdl.handle.net/21.15107/rcub_cer_3652 .

Bobić, Biljana, Bobić, Ilija, Vencl, Aleksandar, Babić, Miroslav, Mitrovic, Slobodan, "Corrosion behavior of compocasted ZA27/SiCp composites in sodium chloride solution" in Tribology in Industry, 38, no. 1 (2016):115-120,
https://hdl.handle.net/21.15107/rcub_cer_3652 .

TY  - JOUR
AU  - Bobić, Ilija
AU  - Ružić, Jovana
AU  - Bobić, Biljana
AU  - Babić, Miroslav
AU  - Vencl, Aleksandar
AU  - Mitrovic, Slobodan
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1566
AB  - Hybrid A356/SiCp/Gr(p) composites were produced via compo-casting using the A356 aluminum alloy as the composite matrix, with silicon carbide microparticles (SiCp) and graphite macroparticles (Gr(p)) as reinforcements. The effect of the thixocasting process on the microstructure of a modified A356 alloy (with 0.03 mass% of strontium) was considered. The microstructures of the thixocast A356 alloy and the synthesized composite materials were examined by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD). The fracture surfaces of the composite matrix and the composites were also analyzed. The thixocast A356 alloy and the composites were subjected to artificial aging after a solution heat treatment. Aging kinetics was followed by hardness measurements. Differential scanning calorimetry (DSC) was applied to reveal the presence of phases formed during artificial aging. The composites reached maximum hardness faster than the thixocast A356 alloy. The time required to attain peak hardness decreases with the increase in the content of particulate reinforcements.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
T1  - Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles
VL  - 612
SP  - 7
EP  - 15
DO  - 10.1016/j.msea.2014.06.028
ER  - 

@article{
author = "Bobić, Ilija and Ružić, Jovana and Bobić, Biljana and Babić, Miroslav and Vencl, Aleksandar and Mitrovic, Slobodan",
year = "2014",
abstract = "Hybrid A356/SiCp/Gr(p) composites were produced via compo-casting using the A356 aluminum alloy as the composite matrix, with silicon carbide microparticles (SiCp) and graphite macroparticles (Gr(p)) as reinforcements. The effect of the thixocasting process on the microstructure of a modified A356 alloy (with 0.03 mass% of strontium) was considered. The microstructures of the thixocast A356 alloy and the synthesized composite materials were examined by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD). The fracture surfaces of the composite matrix and the composites were also analyzed. The thixocast A356 alloy and the composites were subjected to artificial aging after a solution heat treatment. Aging kinetics was followed by hardness measurements. Differential scanning calorimetry (DSC) was applied to reveal the presence of phases formed during artificial aging. The composites reached maximum hardness faster than the thixocast A356 alloy. The time required to attain peak hardness decreases with the increase in the content of particulate reinforcements.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing",
title = "Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles",
volume = "612",
pages = "7-15",
doi = "10.1016/j.msea.2014.06.028"
}

Bobić, I., Ružić, J., Bobić, B., Babić, M., Vencl, A.,& Mitrovic, S.. (2014). Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Elsevier Science Sa, Lausanne., 612, 7-15.
https://doi.org/10.1016/j.msea.2014.06.028

Bobić I, Ružić J, Bobić B, Babić M, Vencl A, Mitrovic S. Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles. in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing. 2014;612:7-15.
doi:10.1016/j.msea.2014.06.028 .

Bobić, Ilija, Ružić, Jovana, Bobić, Biljana, Babić, Miroslav, Vencl, Aleksandar, Mitrovic, Slobodan, "Microstructural characterization and artificial aging of compo-casted hybrid A356/SiCp/Gr(p) composites with graphite macroparticles" in Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 612 (2014):7-15,
https://doi.org/10.1016/j.msea.2014.06.028 . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Ilija
AU  - Vučetić, Filip
AU  - Bobić, Biljana
AU  - Ružić, Jovana
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1399
AB  - The ZA-27 alloy is a zinc-aluminium casting alloy that has been frequently used as the material for sleeves of plain bearings. It has good physical, mechanical and tribological properties. However, one of the major disadvantages is its dimensional instability over a period of time (ageing). To overcome this, copper in the alloy may be replaced with silicon. Coarsening of silicon particles can be controlled by a suitable addition of strontium. In this paper, the commercial ZA-27 alloy and six different Zn25Al alloys (with 1 and 3 wt.% silicon; and with 0, 0.03 and 0.05 wt.% strontium) were obtained by casting in the pre-heated steel mould. Casting of the alloys was carried out at a laboratory level. In the alloys containing silicon, a finer dendritic structure was noticed compared to the structure of the commercial ZA-27 alloy. The addition of strontium influenced the size and distribution of primary silicon particles. Needle-like particles of eutectic silicon were changed into the fibrous ones. The presence of silicon and strontium did not significantly affect mechanical properties of the obtained Zn25Al alloys compared to mechanical properties of the commercial ZA-27 alloy. Wear rate of the alloys containing silicon was lower than that of the ZA-27 alloy. The addition of strontium further lowers the wear rate and slightly increases the coefficient of friction.
PB  - Elsevier Sci Ltd, Oxford
T2  - Materials & Design
T1  - Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition
VL  - 64
SP  - 381
EP  - 392
DO  - 10.1016/j.matdes.2014.07.056
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Ilija and Vučetić, Filip and Bobić, Biljana and Ružić, Jovana",
year = "2014",
abstract = "The ZA-27 alloy is a zinc-aluminium casting alloy that has been frequently used as the material for sleeves of plain bearings. It has good physical, mechanical and tribological properties. However, one of the major disadvantages is its dimensional instability over a period of time (ageing). To overcome this, copper in the alloy may be replaced with silicon. Coarsening of silicon particles can be controlled by a suitable addition of strontium. In this paper, the commercial ZA-27 alloy and six different Zn25Al alloys (with 1 and 3 wt.% silicon; and with 0, 0.03 and 0.05 wt.% strontium) were obtained by casting in the pre-heated steel mould. Casting of the alloys was carried out at a laboratory level. In the alloys containing silicon, a finer dendritic structure was noticed compared to the structure of the commercial ZA-27 alloy. The addition of strontium influenced the size and distribution of primary silicon particles. Needle-like particles of eutectic silicon were changed into the fibrous ones. The presence of silicon and strontium did not significantly affect mechanical properties of the obtained Zn25Al alloys compared to mechanical properties of the commercial ZA-27 alloy. Wear rate of the alloys containing silicon was lower than that of the ZA-27 alloy. The addition of strontium further lowers the wear rate and slightly increases the coefficient of friction.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Materials & Design",
title = "Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition",
volume = "64",
pages = "381-392",
doi = "10.1016/j.matdes.2014.07.056"
}

Vencl, A., Bobić, I., Vučetić, F., Bobić, B.,& Ružić, J.. (2014). Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition. in Materials & Design
Elsevier Sci Ltd, Oxford., 64, 381-392.
https://doi.org/10.1016/j.matdes.2014.07.056

Vencl A, Bobić I, Vučetić F, Bobić B, Ružić J. Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition. in Materials & Design. 2014;64:381-392.
doi:10.1016/j.matdes.2014.07.056 .

Vencl, Aleksandar, Bobić, Ilija, Vučetić, Filip, Bobić, Biljana, Ružić, Jovana, "Structural, mechanical and tribological characterization of Zn25Al alloys with Si and Sr addition" in Materials & Design, 64 (2014):381-392,
https://doi.org/10.1016/j.matdes.2014.07.056 . .