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

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

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

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

FCC+BCC High Entropy Alloys (HEAs)

NbTiVZr BCC MEA

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

Figure 1: Mole fraction of equilibrium phases at various temperatures in the NbTiVZr equiatomic alloy [2017Mao].

HfNbTaTiZr BCC HEA

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

Figure 2: Mole fraction of equilibrium phases at various temperatures in the HfNbTaTiZr equiatomic alloy. The pioneering work of this type of refractory HEA was reported in [2011Sen].

AlxNbTaTiV BCC HEA

Calculated phase equilibria in the isopleth for the series of the AlxNbTaTiV quinary alloys, where x=0-1 represents moles of atoms of the element Al.

Figure 3: Calculated phase equilibria in the isopleth for the series of the AlxNbTaTiV quinary alloys, where x=0-1 represents moles of atoms of the element Al [2017Mao].

References

[2011Sen] O. N. Senkov, J. M. Scott, S. V Senkova, D. B. Miracle, C. F. Woodward, Microstructure and room temperature properties of a high-entropy TaNbHfZrTi alloy. J. Alloys Compd. 509, 6043–6048 (2011).

[2017Mao] H. Mao, H.-L. Chen, Q. Chen, TCHEA1: A Thermodynamic Database Not Limited for “High Entropy” Alloys. J. Phase Equilibria Diffus. 38, 353–368 (2017).