Phase evolution criteria for AlCoCrCuFeMnSix (x = 0, 0.3, 0.6 and 0.9) high entropy alloys based on experiment and thermodynamic calculation

Present study investigates the phase evolution behaviour of AlCoCrCuFeMnSix (x = 0, 0.3, 0.6 and 0.9) high entropy alloys, synthesized by mechanical alloying and arc melting. The phase evolution, microstructure, and mechanical properties were analysed to understand the effect of Si addition in AlCoCrCuFeMn high entropy alloy. The X-ray diffraction, after 15h mechanical alloying, reveals the mixture of body-centered and face-centered cubic structure. The addition of Si favours body-centered cubic structure formation during mechanical alloying. The phase evolution observed after XRD are in accord with the thermodynamically predicted phases.