A new CrFeNi2Al eutectic high entropy alloy system with excellent mechanical properties

A low-cost Co-free CrFeNi(3-x)Alx (x = 1, 0.9, 0.8, 0.7, 0.6) eutectic high entropy alloy (EHEA) system was designed, successfully prepared and characterized. With the increase of Al content, the alloy dramatically transforms from a hypoeutectic to a hypereutectic microstructure together with an increase in strength and a decrease in ductility. The CrFeNi2.2Al0.8 alloy was found to be an eutectic high entropy alloy and was composed of face...