Abstract
Thermodynamic assessment of the ordered B2 phase in the quaternary Ti–V–Cr–Al system is carried out. A set of self-consistent thermodynamic parameters is presented. A two-sublattice model (Al,Cr,Ti,V ) 0.5: (Al,Cr,Ti,V ) 0.5 is used. The predicted phase equilibria and order/disorder transformation temperature are in good agreement with experimental information, both in the Ti–V–Cr–Al quaternary and in the important binary and ternary subsystems. The thermodynamic dataset can be used to predict compositions which are prone to the order/disorder reaction.
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