EFFECT OF AGING TREATMENT AND La CONTENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AZ91 ALLOY

被引：4
|
作者：
Wang Shebin [1 ,2 ]
Qi Xiaoye [1 ]
Zhang Jinling [1 ,2 ]
Liu Lu [1 ]
Xu Bingshe [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China
来源：
ACTA METALLURGICA SINICA | 2011年 / 47卷 / 06期
基金：
中国国家自然科学基金;
关键词：
AZ91 magnesium alloy; aging; mechanical property; microstructure; MAGNESIUM;
D O I：
10.3724/SP.J.1037.2010.00560
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of aging treatment and La content on the microstructures and mechanical properties of AZ91 magnesium alloys were investigated by XRD, SEM, EDS and microhardness meter. The results showed that a great number of beta-phases were precipitated and distributed along the grain boundaries after aging treatment. As the content of La increased, the grain size of beta-phase decreased gradually, while alpha-phase decreased first and then increased. The mechanical properties of as-cast and aged specimens increased first and then decreased as the content of La increased. The tensile strength, yield strength, elongation and Vickers hardness of aged magnesium alloys were increased by 12.65%, 16.85%, 13.71% and 37.24%, respectively. When the content of La was 0.1648%, the tensile strength, yield strength, elongation and Vickers hardness achieved 276 MPa, 208 MPa, 13.85% and 132 HV, respectively.
引用
收藏
页码：743 / 750
页数：8
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