Study on Microstructure，Mechanical and Tribological Properties of the AlxCrFeNi3Ti0.3High-Entropy Alloys

In order to provide technical support and theoretical support for the application of AlxCrFeNi3Ti0.3high-entropy alloy in the tribological field，the AlxCrFeNi3Ti0.3high-entropy alloys (HEAs) were prepared by arc melting，and the effects of the Al contents on the microstructure，mechanical and tribological properties of the HEAs were investigated by X-ray diffractometer，Vickers hardness tester，friction testing machine，universal testing machine，three-dimensional profilometer，scanning electron microscope，etc.Results showed that the addition of the Al made the microstructure of the HEAs transformed from a single FCC phase to a coexistence of FCC and BCC with dendritic structure.With the increase of the Al content，the density of the HEAs decreased while the hardness，yield strength and compressive strength of the HEAs increased significantly，showing excellent comprehensive mechanical properties.Moreover，the addition of the Al significantly improved the wear resistance of the HEAs，in which the room temperature wear re