SIMULATION OF CONCURRENT PRECIPITATION OF TWO STRENGTHENING PHASES IN MAGNESIUM ALLOYS

摘要

The precipitation kinetics and microstructure in Mg-Sn binary and Mg-Al-Sn ternary alloys are simulated using PanPrecipitation coupled with Mg thermodynamic database and a newly established mobility database of the Mg-Al-Sn ternary system. Both Mg_2Sn and Mg_(17)Al_(12) precipitates are considered in this work. The obtained kinetic parameters for these two precipitates can be used in the simulation of both individual and concurrent precipitations of Mg_(17)Al_(12) and Mg_2Sn in Mg-Al-Sn alloys. The simulated microstructure evolution, such as the particle size and number density, are in agreement with experimental data.