Heat treatment, microstructure and mechanical properties of a Mg-Gd-Y alloy grain-refined by Al additions

被引：64

作者：

Dai, Jichun ^{[1
,2
]}

Zhu, Suming ^{[2
]}

Easton, Mark A. ^{[2
]}

Zhang, Mingxing ^{[3
]}

Qiu, Dong ^{[3
]}

Wu, Guohua ^{[1
,4
]}

Liu, Wencai ^{[1
]}

Ding, Wenjiang ^{[1
,4
]}

机构：

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

[2] Monash Univ, CAST Cooperat Res Ctr, Dept Mat Engn, Clayton, Vic 3800, Australia

[3] Univ Queensland, Sch Mech & Min Engn, Div Mat, Brisbane, Qld 4072, Australia

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

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 576卷

基金：

中国国家自然科学基金;

关键词：

Magnesium alloys; Grain refinement; Age hardening; Precipitation; Mechanical properties; MG-10GD-3Y MAGNESIUM ALLOY; ZR ALLOYS; CORROSION BEHAVIOR; TENSILE PROPERTIES; AZ91D; AM50;

D O I：

10.1016/j.msea.2013.04.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of additions of 0.5-1 wt% Al on grain refinement, heat treatment and mechanical properties of Mg-10Gd-3Y (wt%) alloy has been investigated. The additions of 0.6-1 wt% Al showed a dramatic grain refinement effect, which is associated with the formation of the Al-2(Gd0.5Y0.5) particles that act as nucleants for alpha-Mg grains. Compared to the Zr refined counterpart, the Al refined alloy needed to be solution treated at a higher temperature to dissolve the majority of the intermetallic particles. Subsequent ageing at low temperatures led to pronounced precipitation hardening and consequently a large improvement in strength. In the peak-aged condition, the strength of the Al refined alloy is comparable to that of the Zr refined counterpart. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：298 / 305

页数：8

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