Preternatural Hexagonal High-Entropy Alloys: A Review

Rui-Xuan Li, Jun-Wei Qiao, Peter K. Liaw, Yong Zhang

Table 2 Comparison of different refractory high-entropy alloys

Alloy Melting point (°C) Density (g/cm3) Structure Phase stable condition References Ir26Mo20Rh22.5Ru20W11.5 2459 15.37 HCP Annealing at 2373 K for 1 h [56] Ir25.5Mo20Rh20Ru25W9.5 2444 15.18 HCP Annealing at 2373 K for 1 h [56] Ir29.0678Mo15Rh29.0678Ru11.8644W15 2463 16.07 HCP Annealing at 1273 K for 2000 h [57] Hf25Nb25Ti25Zr25 2039 8.4 BCC Annealing at 1573 K for 6 h [58] Nb25Mo25Ta25W25 2904 13.64 BCC Annealing at 1673 K for 19 h [11] Nb20Mo20Ta20W20V20 2673 12.36 BCC Annealing at 1673 K for 19 h [11] Ti20Zr20Hf20Nb20Ta20 2231 9.94 BCC HIPing at 1473 K, 207 MPa for 3 h [14] Mo20Nb20Ta20Ti20V20 2341 9.27 BCC Stable at 516-2162 °C by CALPHAD [59]