Assessment of Co‐Cr‐Ni ternary system by CALPHAD technique

The Co‐Cr‐Ni ternary system was critically assessed using the CALPHAD technique. The solution phases including the liquid, γ(Co,Ni), ɛCo and αCr phases were described by a substitutional solution model. The σ phase was characterized by a three‐sublattice model of (Co,Ni) 8 Cr 4 (Co,Cr,Ni) 18 in order to reproduce its homogeneity range determined by experiments. A self‐consistent set of thermodynamic parameters for each phase was derived.