Assessment of the Al-Ag binary phase diagram

Unusual age hardening of Al-Cu-Mg-Ag alloys with high Cu:Mg ratios has been found to be associated with the formation of the Ω phase. A thermodynamic modelling approach is adopted in the present study to investigate the likelihood of Ag-Mg intermetallic compounds which have been proposed as the initial nuclei for the Ω precipitates. The Thermo-Calc computer package has been used for the present computation. The calculated Ag-Al binary phase diagram is presented in this paper.