Assessment of atomic mobilities and simulation of precipitation evolution in Mg-X (X=Al, Zn, Sn) alloys

• 作者: Yuhui Zhang Yuling Liu Shuhong Liu Hai-Lin Chen Qing Chen Shiyi Wen Yong Du
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 70-82
• 页数: 13页
• 语种: 英文

摘要

As potential cast and wrought Mg alloys,Mg-X (X=Al,Zn,Sn) based alloys have attracted great interest.This work is to develop a dataset of atomic mobilities that is valid over a wide composition range.With the obtained mobilities,and a compatible thermodynamic description,as well as thermophysical parameters,simulations are performed to predict the characteristics of precipitation evolution.Examples are presented for the isothermal aging processes in Mg-x wt.％Al (x =5.9,6,8.8,9),Mg-x wt.％Zn (x =6,6.2,8,8.65),Mg-x wt.％Sn (x =6.04,6.92,8.64) alloys.The simulated size distribution,number density and volume fraction of precipitates reasonably account for the experimental results and provide additional information for further alloy composition design and heat treatment optimization.