Microstructure and mechanical properties of as-cast and extruded Mg-8Li-3Al-2Zn-0.5Nd alloy

被引：44
|
作者：
Zhang, Jie [1 ,2 ]
Zhang, Yang [1 ,2 ]
Wu, Guohua [1 ,2 ]
Liu, Wencai [1 ,2 ]
Zhang, Liang [1 ,2 ]
Ding, Wenjiang [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 621卷
基金：
中国国家自然科学基金;
关键词：
Mg-Li alloy; Extrusion; Microstructure; Mechanical properties; MG-LI ALLOYS; DEFORMATION-BEHAVIOR; ND;
D O I：
10.1016/j.msea.2014.10.076
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Mg-8Li-3Al-2Zn-0.5Nd (wt%) alloy was prepared by casting and deformed by hot extrusion in this study. The microstructure of as-cast and extruded samples was analyzed with OM, XRD, SEM and EDS. The results show that, as-cast Mg-8Li-3Al-2Zn-0.5Nd alloy is composed of alpha-Mg, beta-Li AlLi, MgLi2Al and Al2Nd phases. The microstructure is refined after hot extrusion. Al2Nd phase is crushed and distributed uniformly along the extrusion direction. The mechanical properties of Mg-8Li-3Al-2Zn-0.5Nd alloy are also improved after hot extrusion. The improvement in mechanical properties is mainly attributed to the grain refinement and dispersion strengthening. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：198 / 203
页数：6
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