Thermodynamic assessment of the Al–Cu–Zn system, Part III: Al–Cu–Zn ternary system

A comprehensive thermodynamic reassessment of the Al–Cu–Zn system is elaborated covering the complete ternary composition range and compared with all presently available experimental phase equilibrium and thermodynamic data. One key distinction compared to previous CALPHAD work is the thermodynamic modeling of the γ phases, which is based on a detailed discussion of the crystal structure and simplified only to an extent necessary for a viable application in the ternary system. That entails significant changes in the ternary solid solution range of these phases. Revised aspects of the Al–Cu and Cu–Zn binary systems, elaborated in the reassessment in Parts I and II of this series, are incorporated as basis of the ternary system in this final Part III. •Al–Cu–Zn experimental data extensively compared with calculated results.•Better agreement with experimental data compared to previous Calphad work.•New thermodynamic modeling for the γ phases based on crystal structure.