Abstract
The effects of applied load and temperature on the dry sliding wear behavior of 6061 aluminum alloy matrix composites reinforced with SiC whiskers or SiC particulates were investigated using a hardened steel ball and a block of the composite material. The wear rate decreased as the applied load increased. However, there was a critical load above which the wear rate increased rapidly as the applied load increased. Transitions in wear mechanisms occur below and above this load. From both the wear rate and the critical applied load, it was confirmed that the wear resistance of the 6061 aluminum alloy was enhanced by reinforcing with SiC whiskers or SiC particles, both at room and elevated temperatures. However, the temperature dependence of the critical applied load was almost the same for both 6061 A1 and the composites, and the critical load decreased with temperature.
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