Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8004562 | Journal of Magnesium and Alloys | 2018 | 8 Pages |
Abstract
Microstructural evolution of Mg-15Gd-1Zn-0.4Zr (GZ151K, wt%) alloys, cast under 0â¯MPa (gravity cast) and 6â¯MPa (squeeze cast), were comparatively studied. It is found that the grain size of squeeze cast GZ151K alloy with applied stress 6â¯MPa is much smaller than that of the gravity cast counterpart. Moreover, the squeezing pressure hinders the transition from β' precipitates to β1 precipitates during subsequent aging process, leading to reduced volume fraction of β1 precipitates in the squeeze cast alloy. Thus, the relatively lower volume fraction of β1 precipitates in the squeeze cast GZ151K results in higher hardness increment and stronger precipitation hardening effect.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Zhao Qian, Wu Yujuan, Rong Wei, Wang Ke, Yuan Lingyang, Xiangwen Heng, Peng Liming,