HCP Medium (MEA) and High Entropy (HEA) Alloys

These examples show some classical calculations of the equilibrium phase stabilities for the HCP medium entropy (MEA) and high entropy (HEA) alloys when using the TCS High Entropy Alloys Database (TCHEA).

CoFeReRu HCP MEA

$Mole fraction of equilibrium phases at various temperatures in the CoFeReRu equiatomic alloy.$

Figure 1: Mole fraction of equilibrium phases at various temperatures in the CoFeReRu equiatomic alloy. The experimental validation is reported in [2016Gao].

IrMoRhRuW HCP HEA

$Mole fraction of equilibrium phases at various temperatures in the Ir26Mo20Rh22.5Ru20W11.5 high entropy alloy.$

Figure 2: Mole fraction of equilibrium phases at various temperatures in the Ir₂₆Mo₂₀Rh_22.5Ru₂₀W_11.5 high entropy alloy. The experimental validation is reported in [2019Tak].

References

[2016Gao] M. C. Gao, B. Zhang, S. M. Guo, J. W. Qiao, J. A. Hawk, High-Entropy Alloys in Hexagonal Close-Packed Structure. Metall. Mater. Trans. A. 47, 3322–3332 (2016).

[2019Tak] A. Takeuchi, T. Wada, H. Kato, High-Entropy Alloys with Hexagonal Close-Packed Structure in Ir26Mo20Rh22.5Ru20W11.5 and Ir25.5Mo20Rh20Ru25W9.5 Alloys Designed by Sandwich Strategy for the Valence Electron Concentration of Constituent Elements in the Periodic Chart. Mater. Trans. 60, 1666–1673 (2019).