Effect of Cryogenic Treatment on Microstructure of Mg-2Zn-0.7Ce Alloy

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Li, Quan^1 ; Yuan, Zhi^2 ; Jiang, Aimin^1 ; Zhu, Weibo^1 ; She, Xinwei^1

Chongqing Academy of Science and Technology, Chongqing

401123, China^1

Guilin University of Aerospace Technology, Guilin

541000, China^2

关键词: As-extruded;    Cryogenic environment;    Microstructure observation;    Nucleation kinetics;    Precipitation mechanism;    Secondary phase particles;    W phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/3/032042/pdf
DOI  :  10.1088/1755-1315/170/3/032042

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, the microstructure observation of Mg-2Zn-0.7Ce alloy before and after cryogenic treatment is presented. The microstructure of as-extruded alloy is composed of α-Mg and W phase. After cryogenic treatment for 1min, there are some secondary phase particles precipitating. With increasing cryogenic duration, the volume fraction of precipitates increases as well. After cryogenic treatment for 24h, the volume fraction of W phase increases from 0.2% to 7.3%. The precipitation mechanism of W phase is due to the contraction of Mg lattice under cryogenic environment, since it needs extra space as nucleation kinetics.