Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles
Apstrakt
In the present study, the effect of the Al2O3 particles (average size of 12 mu m, 3 and 10 wt.%) reinforcement on the microstructure and tribological properties of Al-Si alloy (A356) was investigated. Composites were produced by applying compocasting process. Tribological properties of unreinforced alloy and composites were studied, using pin-on-disc tribometer, under dry sliding conditions at different specific loads and sliding speed of 1 m/s. Microhardness measurements, optical microscope and scanning electron microscope were used for microstructural characterization and investigation of worn surfaces and wear debris. During compocasting of A356 alloy, a transformation from a typical dendritic primary alpha phase to a non-dendritic rosette-like structure occurred. Composites exhibited better wear resistance compared with unreinforced alloy. Presence of 3 wt.% Al2O3 particles in the composite material affected the wear resistance only at specific loads up to 1 MPa. The wear rate of c...omposite with 10 wt.% Al2O3 particles was nearly two order of the magnitude lower than the wear rate of the matrix alloy. Dominant wear mechanism for all materials was adhesion, with others mechanisms: oxidation, abrasion and delamination as minor ones.
Ključne reči:
Compocasting / Al-Si alloy / Al2O3 particles / Dry sliding / Friction / WearIzvor:
Tribology Letters, 2008, 32, 3, 159-170Finansiranje / projekti:
- Ministry of Science of the Republic of Serbia
DOI: 10.1007/s11249-008-9374-6
ISSN: 1023-8883
WoS: 000261038000003
Scopus: 2-s2.0-56749102781
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Vencl, Aleksandar AU - Bobić, Ilija AU - Jovanović, Milan T. AU - Babić, Miroslav AU - Mitovic, Slobodan PY - 2008 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3572 AB - In the present study, the effect of the Al2O3 particles (average size of 12 mu m, 3 and 10 wt.%) reinforcement on the microstructure and tribological properties of Al-Si alloy (A356) was investigated. Composites were produced by applying compocasting process. Tribological properties of unreinforced alloy and composites were studied, using pin-on-disc tribometer, under dry sliding conditions at different specific loads and sliding speed of 1 m/s. Microhardness measurements, optical microscope and scanning electron microscope were used for microstructural characterization and investigation of worn surfaces and wear debris. During compocasting of A356 alloy, a transformation from a typical dendritic primary alpha phase to a non-dendritic rosette-like structure occurred. Composites exhibited better wear resistance compared with unreinforced alloy. Presence of 3 wt.% Al2O3 particles in the composite material affected the wear resistance only at specific loads up to 1 MPa. The wear rate of composite with 10 wt.% Al2O3 particles was nearly two order of the magnitude lower than the wear rate of the matrix alloy. Dominant wear mechanism for all materials was adhesion, with others mechanisms: oxidation, abrasion and delamination as minor ones. T2 - Tribology Letters T1 - Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles VL - 32 IS - 3 SP - 159 EP - 170 DO - 10.1007/s11249-008-9374-6 ER -
@article{ author = "Vencl, Aleksandar and Bobić, Ilija and Jovanović, Milan T. and Babić, Miroslav and Mitovic, Slobodan", year = "2008", abstract = "In the present study, the effect of the Al2O3 particles (average size of 12 mu m, 3 and 10 wt.%) reinforcement on the microstructure and tribological properties of Al-Si alloy (A356) was investigated. Composites were produced by applying compocasting process. Tribological properties of unreinforced alloy and composites were studied, using pin-on-disc tribometer, under dry sliding conditions at different specific loads and sliding speed of 1 m/s. Microhardness measurements, optical microscope and scanning electron microscope were used for microstructural characterization and investigation of worn surfaces and wear debris. During compocasting of A356 alloy, a transformation from a typical dendritic primary alpha phase to a non-dendritic rosette-like structure occurred. Composites exhibited better wear resistance compared with unreinforced alloy. Presence of 3 wt.% Al2O3 particles in the composite material affected the wear resistance only at specific loads up to 1 MPa. The wear rate of composite with 10 wt.% Al2O3 particles was nearly two order of the magnitude lower than the wear rate of the matrix alloy. Dominant wear mechanism for all materials was adhesion, with others mechanisms: oxidation, abrasion and delamination as minor ones.", journal = "Tribology Letters", title = "Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles", volume = "32", number = "3", pages = "159-170", doi = "10.1007/s11249-008-9374-6" }
Vencl, A., Bobić, I., Jovanović, M. T., Babić, M.,& Mitovic, S.. (2008). Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles. in Tribology Letters, 32(3), 159-170. https://doi.org/10.1007/s11249-008-9374-6
Vencl A, Bobić I, Jovanović MT, Babić M, Mitovic S. Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles. in Tribology Letters. 2008;32(3):159-170. doi:10.1007/s11249-008-9374-6 .
Vencl, Aleksandar, Bobić, Ilija, Jovanović, Milan T., Babić, Miroslav, Mitovic, Slobodan, "Microstructural and Tribological Properties of A356 Al-Si Alloy Reinforced with Al2O3 Particles" in Tribology Letters, 32, no. 3 (2008):159-170, https://doi.org/10.1007/s11249-008-9374-6 . .