Understanding microstructure and mechanical properties of (AlTa_0.76)_xCoCrFeNi_2.1 eutectic high entropy alloys via thermo-physical parameters

Min Jung Kim^a, Gyeol Chan Kang^a, Sung Hwan Hong^a, Hae Jin Park^a, Sang Chul Mun^a, Gian Song^b^,^*, Ki Buem Kim^a^,^*(

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Fig. 5.. The Relationships between (a) the mixing enthalpy (ΔH_mix) and atomic size difference (δ_r), (b) the valence electron concentration (VEC) and atomic size difference (δ_r) for the (AlTa_0.76)_xCoCrFeNi_2.1 (x = 0.1, 0.3, 0.5, 0.7, 1.0 and 1.5) alloys, and (c) the table representing typically- reported HEAs with different compositions and microstructures, which are marked by various symbols in (a) and (b). Black circles represent the Al_x alloys developed in the present study. Blue square areas represent ranges to form eutectic structures from previous EHEAs, and bright and dark yellow ellipses indicate regimes to form BCC or FCC single-phase HEAs, respectively [32].