Solidification simulation of Al-Mg-Er alloys using CALPHAD method
(1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Hunan Province of the Nonferrous Metal Material Science and Engineering,
Central South University, Changsha 410083, China)
2. Key Laboratory of Hunan Province of the Nonferrous Metal Material Science and Engineering,
Central South University, Changsha 410083, China)
Abstract: With CALPHAD(calculation of phase diagrams) method, the solidification paths of several Al-rich Al-Mg-Er alloys were calculated with Scheil—Gulliver model in the Thermo-calc software. And the amounts of several phases formed during solidification were also calculated. Synchronously, the heat-treatment temperatures of the same alloys were predicted by thermodynamic calculation. The calculated results show that by adding 0.4%Er (mass fraction), the strength effect of Er in Al-Mg alloy is better. This result is in agreement with the experimental investigations.
Key words: Al-Mg-Er alloys; solidification simulation; CALPHAD