Structure and Properties of AlCrCo<sub>(1-x)</sub>Fe<sub>(1+x)</sub>Ni<sub>2</sub> High Entropy Alloy

High entropy alloys possess excellent properties and a great deal of research is being carried out on them. AlCrCo (1-x) Fe (1+x) Ni 2 (x= 0, 0.5, 1) alloys were arc melted and suction cast in strip form in a controlled atmosphere. The alloys were characterized for crystal structure, phases and Vickers hardness. A two phase vermicular structure was observed for alloys with x = 0 – 0.5 consisting of Ni rich BCC and Cr rich FCC phases while a widmanstatten structure formed in alloy with x = 1 (without Co). An increase in the amount of BCC phase and hardness was noted with the replacement of Co with Fe caused mainly due to increase in Al and decrease of Cr in composition obtained through EDS. Vickers hardness of 251 H V was measured in alloy without Co.