Microstructure and wear behavior of the Al/ZK60 Mg laminated composite produced by the severe plastic deformation process

Abstract

In this research, the microstructure, tensile properties, hardness, and wear behavior of the Al/ZK60 Mg laminated composite produced by the accumulative roll bonding (ARB) and vacuum plasma cleaning methods were investigated. ARB process continued until the sixth pass at ambient temperature and at each stage, the surfaces cleaning was done by the vacuum plasma method. The results showed that with the rise in ARB passes, the reinforcement distribution in the matrix has become more homogeneous, which caused a 60% increase in the hardness of the sixth pass compared to the first pass. The results of the tensile tests showed that with the rise in ARB passes up to the fourth pass, the strength and elongation increased simultaneously by 40% and 225% compared to the first pass, and with the rise in ARB passes up to the sixth pass, with the increase of strength, the elongation decreased slightly. The wear tests were performed at loads of 10, 20, 40, and 80 N for different passes at room temperature. The findings indicated that as the number of ARB passes increased, the wear rate decreased up to 65%. Also, the examination of the worn surfaces showed that the abrasive wear mechanism prevailed in the lower passes and the delamination mechanism prevailed in the higher passes.