Grain refinement of Mg-10Gd alloy by Al additions

被引：55

作者：

Dai, Jichun ^{[1
,2
]}

Easton, Mark ^{[2
]}

Zhu, Suming ^{[2
]}

Wu, Guohua ^{[1
,3
]}

Ding, Wenjiang ^{[1
,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] Monash Univ, Dept Mat Engn, CAST Cooperat Res Ctr, Clayton, Vic 3800, Australia

[3] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2012年 / 27卷 / 21期

基金：

中国国家自然科学基金;

关键词：

MAGNESIUM ALLOYS; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; MICROSTRUCTURE; CRYSTALLOGRAPHY; ZR; PRECIPITATION; INOCULATION; RESISTANCE; SIZE;

D O I：

10.1557/jmr.2012.313

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The addition of Al to a Mg-10Gd alloy was found to lead to substantial grain size reduction during casting at concentrations between 0.8% and 1.3%. At these concentrations, Al2Gd particles were found at the center of grains, and the orientation relationship [112](Al2Gd) parallel to [2 (1) over bar(1) over bar0](alpha-Mg), (1 (1) over bar0)(Al2Gd) parallel to (0 (1) over bar 10)(alpha-Mg) was found reproducibly between Al2Gd and alpha-Mg, indicating that these are the heterogeneous nucleant particles that form in situ at these Al contents. Most of these nuclei were between 2 and 7 mu m in size. Furthermore, little grain coarsening was observed during solution treatment, particularly compared with an alloy grain refined by Zr particles where substantial coarsening occurred. This appears to be because Al2Gd particles restrict grain boundary motion during solution treatment.

引用

页码：2790 / 2797

页数：8

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