Microstructure and Mechanical Properties Investigation of New Al<sub>10</sub>Cr<sub>12</sub>Mn<sub>28</sub>Fe<sub>(50-x)</sub>Ni<sub>(x)</sub> High Entropy Alloys

In the present study, two newly developed non-equiatomic high entropy Al 10 Cr 12 Mn 28 Fe ( 50- x ) Ni ( x ) alloys (x= 20 & 15 at%, namely: Ni 20 & Ni 15 , respectively) are investigated. The studied HEAs were designed based on thermodynamic principles to maintain high ductility and improve strength. Ingots were prepared using arc-melting then microstructure examinations and mechanical properties for the as-cast alloys were done. The mechanical properties were enhanced for the as-cast material, compared with previously introduced HEAs of the same system, namely Al 5 Cr 12 Mn 28 Fe 35 Ni 20 , (Al 5 ) and Al 10 Cr 12 Mn 23 Fe 35 Ni 20 , (Al 10 ). Al 10 Cr 12 Mn 28 Fe 30 Ni 20 (Ni 20 ) HEA generally shows the highest compressive yield strength which was improved by ∼7% when compared with previously introduced Al 10 .