Database for refractory high entropy alloys (RHEA)

  • thermodynamic
  • mobility
  • molar-volume


  • Number of components: 19
  • Number of phases: 430
  • Major alloying elements: Al, Co, Cr, Cu, Fe, Hf, Mn, Mo, Nb, Ni, Si, Ta, Ti, V, W, and Zr
  • Minor alloying elements: B, C and O

PanRHEA – Thermodynamic database (TH), Mobility database (MB), and Molar volume (MV) database for refractory high entropy alloys (RHEA).

  • The current PanRHEA_TH thermodynamic database consists of 19 components, 430 phases. 171 binaries and 110 constituent ternaries have been critically assessed.
  • The current PanRHEA_MB mobility database includes assessed mobility model parameters for the Liquid, Bcc, Fcc, and Hcp solution phases. It is compatible with the PanRHEA_TH and suitable for the simulation of diffusion controlled phenomena of multi-component RHEAs.
  • The current PanRHEA_MV molar volume database covers all the 430 phases assessed in PanHEA_TH, and can be combined with the thermodynamic database for the simulation of thermo-physical properties of RHEAs, such as density and thermal expansion.

Equilibrium calculation of the Hf0.5Nb0.5Ta0.5Ti1.5Zr RHEA alloy

The calculated phase equilibrium of the Hf0.5Nb0.5Ta0.5Ti1.5Zr vs. temperature using the PanRHEA database shows that the Bcc phase is stable within a large temperature range and three phases (Bcc#1+Bcc#2+Hcp) coexist at 500 °C, which is consistent with the experimental observations well in the literature.