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The influence of reinforcement size and matrix heat treatment on the wear mechanisms and wear rates during dry sliding of 2009 Al-20 vol.% SiC P composite have been examined. Friction and wear measurements were correlated with surface and subsurface deformation mechanisms utilizing scanning electron micrography and EDX analysis. Friction analysis showed that increasing particulate size from...
A statistical model for steady-state sliding wear of the metal counterpart in metal-composite systems has been extended to include composite reinforcement size and size distribution. It has been shown that the wear rate of the metal counterpart under conditions where MMC wear is characterized by plastic deformation (microplowing) is controlled by the ratio between the mean of particulate radius squared...
The dry sliding wear performance of discontinuously reinforced aluminum (DRA) as investigated by numerous studies during the last two decades is reviewed and discussed. In general DRAs feature substantially better wear resistance than their respective unreinforced matrix. However, under particular conditions and wear mechanisms, the wear performance of the overall DRA-metal couple is similar to or...
The surface evolution during dry sliding wear of 2009 Al-20vol.%SiC p on 17-4 PH with differing SiC p sizes (4, 10, 13 and 29 μm) was investigated. Surface profilometry indicated, independent of composite reinforcement size, that the roughness (R a and R q ) increased throughout the entire sliding distance, the larger (29 μm) particulate-reinforced composite showing...
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