The effects of alloying elements on microstructures and mechanical properties of tungsten inert gas welded AZ80 magnesium alloys joint

被引：11

作者：

Li, Hui ^{[1
,2
]}

Zhang, Jiansheng ^{[3
]}

Ding, Rongrong ^{[3
]}

机构：

[1] Chongqing Univ, Coll Mech Engn, Sha Zheng Jie 174, Chongqing 400030, Peoples R China

[2] Chongqing Univ Technol, Hong guang Rd 69, Chongqing 400054, Peoples R China

[3] Chongqing Univ, Coll Mat Sci & Engn, Sha Zheng Jie 174, Chongqing 400030, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2017年 / 4卷 / 11期

基金：

中国国家自然科学基金;

关键词：

microstructure; macrostructure; mechanical properties; magnesium alloy; TIG welding; EVOLUTION; STRENGTH; BEHAVIOR; TIG;

D O I：

10.1088/2053-1591/aa9483

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of alloying elements on the macrostructures, microstructures and tensile strength of AZ80 Mg alloy weldments were studied in the present study. The results indicate that with the decrease of Al element content of filler wire, the welding defects of seam are gradually eliminated and the beta-Mg17Al12 phases at alpha-Mg boundaries are refined and become discontinuous, which are beneficial to the improvement of tensile strength. With AZ31 Mg alloy filler wire, the maximum tensile strength of AZ80 weldment is 220 MPa and fracture occurs at the welding seam of joint. It is experimentally proved that robust AZ80 Mg alloy joints can be obtained by tungsten inert gas (TIG) welding process with AZ31 Mg alloy filler wire. However, further study is required to improve the microstructures and reduce welding defects of joint in order to further improve the joining strength of AZ80 Mg alloy joint.

引用

页数：7

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