期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.10.077
关键词
Magnesium alloy; Mechanical property; Microstructure; High strength; Thermomechanical treatment
类别
资金
- National Key Technologies RD Program [2012BAE01B04, 2012DFH50100, KZCX2-XB3-06, 201001C0104669453]
- Chinese Academic of Sciences and German Academic Exchange Service (CAS-DAAD) scholarship program
A high strength Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy has been successfully fabricated via hot extrusion, cold rolling and ageing treatment. The alloy exhibits an average 0.2% proof stress (YS) of 481.6 +/- 19.9 MPa, an average ultimate tensile strength (UTS) of 517.4 +/- 27.5 MPa and an average elongation to failure of 2.0 +/- 0.4% at room temperature. The best mechanical property obtained in the present study has a YS of 502.0 MPa, an UTS of 546.8 MPa and an elongation to failure of 2.6%. The high strength of this alloy is attributed to the fine grains, stacking faults (SFs), long period stacking ordered (LPSO) phase, and precipitates of Mg5RE phase at grain boundaries and of beta' phase inside the grains. Cold rolling improves the mechanical properties and enhances the ageing hardening response, but decreases the ductility. Two texture components are found simultaneously in the deformed alloy. One is the typical Mg-RE texture and another one is the unusual prismatic texture. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据