Effect of Phase Proportion on Wear Behavior of Al–Cr–Fe–Ni Dual-Phase High Entropy Alloys

Abstract

Al–Cr–Fe–Ni dual-phase high entropy alloys (HEAs) were prepared by arc melting, and the microstructure and wear behavior of HEAs were investigated. The results show that HEAs were consisted by face-centered cubic (FCC) phase and body-centered cubic (BCC) phase, which is consistent with the design. As the BCC phase volume fraction increases, the hardness increases from 183 HV (X-10) to 433 HV (X-90), since that the hardness of BCC phase is higher compared with the FCC phase. The average friction coefficient decreases from 0.409 to 0.111 and the wear depth of alloys decrease from 7.629 to 0.973 μm, which inadicate that the wear resistance of Al–Cr–Fe–Ni dual-phase HEAs are improved with the increase in BCC phase volume fraction. The volume fraction of BCC phase is the main factor affecting the wear behavior of alloys.