Effects of RE on the microstructure and mechanical properties of Mg-8Zn-4Al magnesium alloy

被引：118
作者：
Wang, YX [1 ]
Guan, SK
Zeng, XQ
Dine, WJ
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200030, Peoples R China
[2] Zhengzhou Univ, Sch Mat Engn, Zhengzhou 450002, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 416卷 / 1-2期
关键词：
Mg-8Zn-4Al magnesium alloy; RE; microstructure; mechanical properties;
D O I：
10.1016/j.msea.2005.09.104
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Effects of rare earth (RE) alloy element on the microstructure and mechanical properties of M-8Zn-4Al (ZA84) alloy have been investigated. The differential scanning calorimetry (DSC) technique was used to study the solidification and aging process of ZA84 and ZA84-xRE alloys. The results show that a new quaternary precipitate Mg3Al4Zn2RE forms during the solidification and its phase transformation temperature point is 413 degrees C in RE-containing ZA84 alloys. The microstructure of ZA84 alloy can be refined, epsilon phases formed, microhardness of the matrix increased and time for attaining microhardness peak value of aging ZA84-xRE alloys delayed, with increasing RE. Thus, the room temperature and high temperature tensile properties of as-cast and aged ZA84 alloys can be improved by RE addition. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：109 / 118
页数：10
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