Microstructure and Mechanical Properties of Magnesium Alloy AZ31B Brazed Joint Using a Zn-Mg-Al Filler Metal

被引：28
|
作者：
Ma, Li [1 ]
He, Dingyong [1 ]
Li, Xiaoyan [1 ]
Jiang, Jianmin [1 ]
机构：
[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2010年 / 26卷 / 08期
关键词：
Filler metal; Brazing; Microstructure; Mechanical properties;
D O I：
10.1016/S1005-0302(10)60117-X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to join the similar magnesium alloy, a novel Zn-Mg-Al filler metal was designed and applied to braze AZ31B plates by using high-frequency induction brazing technique. The microstructure, phase constitution and fracture morphology of the brazed joint were investigated. The experimental results show that MgZn(2) phase in the original filler metal is completely consumed in the brazing process. Moreover, alpha-Mg solid solution and alpha-Mg+MgZn eutectoid structure formed in the brazing region due to the intensive alloying between the molten filler metal and the base metal in the brazing process. Test results indicate that the shear strength of the brazed joint is 56 MPa. The fracture morphology of the brazed joint shows intergranular fracture mode, where crack originates from the hard a-Mg+MgZn eutectoid structure.
引用
收藏
页码：743 / 746
页数：4
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