Abstract
Al0.5CoCrFeNi high-entropy alloy particles reinforced aluminum matrix composites (HEAps/AMCs) with various reinforcement additions (0.5, 1.5, 3.0, and 5.0 wt%) were fabricated. The coefficient of friction (COF, about 0.45–0.47) and wear rate (0.32–0.40 10–3 mm3/Nm under 30 N) of HEAps/AMCs tribosystems with a moderate range of reinforcement (0.5–3.0 wt%) were lower than the matrix alloy. HEAps hindered plastic deformation of the contact surface, increasing the wear resistance of the AMCs. Due to the tight interface and the interaction between the HEA particles and dislocations, the AMC was stabilized during the wear tests and showed a dramatically improved capacity to resist crack initiation, propagation, and fracture around the interface.
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