Study on the wear behavior of CoCrFeNiAl1.0 high entropy alloy at high temperature

In this study, the microstructure and wear behavior at high temperature of CoCrFeNiAl1.0 high-entropy alloys were analyzed. The results show that the alloy structure is composed of equiaxed grains, including bcc phase and a small amount of fcc phase. The friction coefficient of the alloy gradually decreased with the increase of temperature, and the wear rate showed a trend of increasing first and then decreasing. Oxidation will aggravate the wear of the alloy at a lower temperature, but it will increase the wear resistance of the alloy when the temperature exceeds 400 °C due to densification and ceramization of the oxide layer.