Microstructural evolution of Mg-10Gd-3Y-1Zn-0.4Zr (wt%) alloy prepared by strain-induced melt activation process

被引：14

作者：

Chang, Zhiyu ^{[1
,2
]}

Wu, Yujuan ^{[1
,2
,3
]}

Su, Ning ^{[1
,2
]}

Deng, Qingchen ^{[1
,2
]}

Wu, Qianye ^{[1
,2
]}

Xue, Yanting ^{[1
,2
]}

Peng, Liming ^{[1
,2
,3
]}

Ding, Wenjiang ^{[1
,2
,3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Mat Genome Initiat Ctr, Shanghai 200240, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2021年 / 171卷

基金：

中国国家自然科学基金;

关键词：

Semisolid; Magnesium alloy; Microstructure; Grain size; Coarsening;

D O I：

10.1016/j.matchar.2020.110831

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The semisolid billets of Mg-10Gd-3Y-1Zn-0.4Zr (wt%) alloy were prepared by the strain-induced melt activation (SIMA) route, and the effects of isothermal heating parameters on the morphology and coarsening kinetics of primary solid grains were studied. It was found that the average grain size increased with the increase of isothermal time while the grain size showed different changing laws with the temperature at different isothermal times. The growth behavior of the primary solid grains was predominantly governed by the Ostwald ripening mechanism, although there is coalescence mechanism in some cases. As the isothermal temperature increased from 550 degrees C to 590 degrees C, the coarsening rate constant increased continuously and then declined when the temperature was further increased to 610 degrees C. Compared with other SIMA processed magnesium alloys, the present alloy showed a significantly lower grain coarsening rate constant due to the inhibiting effect of rare earth (RE) elements on coarsening. This research has provided an insight into the microstructural evolution of Mg-RE alloy under different heating conditions, and will provide valuable information for potential industrial applications.

引用

页数：12

共 66 条

[1] Semi-solid microstructure evolution during reheating of aluminum A356 alloy deformed severely by ECAP [J].