Microstructure and mechanical properties of Al_xCoCr-CuFeNi multi-element high entropy alloy

Effects of Al content on microstructure and mechanical properties of AL_xCoCrCuFeNi multi-element high entropy alloy were investigated by XRD (X-ray diffraction), SEM (scanning electron microscope) and compressive testing. The results verify that microstructure of the as-rast alloy exhibits typically den-drite in which there exists distinctly Cu-enrichment. With increasing in Al content, FCC content is decreased and BCC phase content is increased, which results in the high yield strength and plastic strain more than 5. 8% in AlCoCrCuFeNi alloy.