High-temperature tribological behavior of the Al/Mg/Cu multilayered composite produced by the severe plastic deformation

Abstract

In the current research, the microstructure and wear behavior of Al/Mg/Cu multilayered composite at high temperatures were investigated. For this purpose, the Al/Mg/Cu composite was produced by the accumulative roll bonding (ARB) process and continued until the sixth pass at ambient temperature. The hot wear tests were performed at loads of 10, 20, and 40 N at 100, 150, and 250 °C for different passes. The findings demonstrated that with the increase of ARB passes, the wear rate decreased. So under 40 N at 100, 150, and 250 °C, the wear rate in the sixth pass decreased by 53 %, 65 %, and 76 %, respectively, compared to the first pass. The examination of the worn surfaces showed at 100 °C under high loads, fatigue wear was dominant. At 150 °C, oxidation was the main wear mechanism. The presence of oxidized grooves on the surface showed that the abrasive wear encouraged oxidation. At 250 °C under 40 N, inhomogeneous oxidation was the main wear mechanism of the samples. So that aluminum and magnesium regions were oxidized and copper areas remained un-oxidized like isolated islands.