Assessment of atomic mobilities and simulation of precipitation evolution in Mg-X (X=Al, Zn, Sn) alloys. (30th January 2021)

• Record Type: Journal Article
• Authors: Zhang, Yuhui; Liu, Yuling; Liu, Shuhong; Chen, Hai-Lin; Chen, Qing; Wen, Shiyi; Du, Yong
• Is Part Of: Journal of materials science & technology. Volume 62(2021)
• Page Start: 70
• Page End: 82
• Publication Date: 2021-01-30
• Subjects: Atomic mobility -- Magnesium alloys -- Precipitation -- Alloy design; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2020.05.036
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: 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.