Partial Substitution of Mn by Al in the Cocrfenimnxal20-X (X=5, 10, 15) High Entropy Alloy Prepared of Mechanical Alloying and Spark Plasma Sintering

High-entropy alloys are known to possed good mechanical properties which usually related the preparation technique. In this work, CoCrFeNiMnXAl20-X (X=5, 10, 15) were prepared by a combination of alloying (MA) and com-pacted via spark plasma sintering (SPS). Such materials examined for their phase composition microstructure. Furthermore, as result content Mn/Al determined. It was found, that partial substitution Mn Al lead increasing volume solid solution with BCC crystallographic lattice within ultrafine-grained microstructure such materials. Moreover, alloy also improvement properties. The CoCrFeNiMn5Al15 reached best all showing compressive strength 2496 MPa having hardness 668 HV 1.