Wear Performance of As-Cast and Heat Treated ZK۶۰ Mg Alloy Under Different Applied Loads

In this research, the effect of applied load on sliding wear characteristics of as-cast and heat treated ZK۶۰ Mg alloy was investigated. The as-cast alloy was homogenized at ۴۵۰°C and aged at ۱۷۰°C for ۱۰ and ۳۵ h. The dry sliding wear behavior of the as-cast and heat treated alloys was investigated using a pin-on-disk wear test under various loads in the range of ۱۰-۱۶۰ N at a sliding velocity of ۰.۱ m/s for ۱۰۰۰ m. The worn surfaces were evaluated using scanning electron microscopy equipped with energy dispersive spectroscopy analysis. The results confirmed that the wear mechanism was dependent on the applied load. Findings revealed that the most dominant wear mechanisms under low, intermediate and high loads were oxidation, abrasion/adhesion and delamination, respectively. The heat-treated and as-cast alloys showed almost similar wear resistance under low loads, however, the heat-treated alloys showed better wear resistance than the as-cast ones at high loads.

کلیدواژه ها:

ZK۶۰ alloy ، Wear Mechanism ، Heat treatment ، Wear rate ، Engine