Fatigue behaviour and life estimation of Mg/Al ultrasonic spot weld bonding welds

被引：14
作者：
Feng, Meng-Nan [1 ]
Chen, Yao [1 ]
Fu, Dong-Hui [2 ]
Qu, Chuan [2 ]
Luo, Zhen [1 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300150, Peoples R China
[2] Tianjin Univ, Sch Mech Engn, Tianjin, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2018年 / 23卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Mg/Al dissimilar joint; ultrasonic spot weld bonding; fatigue behaviour; fatigue life estimation; fatigue fracture mode; LAP-SHEAR SPECIMENS; INTENSITY FACTOR SOLUTIONS; MAGNESIUM ALLOYS; DISSIMILAR JOINTS; MICROSTRUCTURE CHARACTERISTICS; MECHANICAL PERFORMANCE; AZ31; MAGNESIUM; ALUMINUM-ALLOY; KINKED CRACKS; STEEL SHEETS;
D O I：
10.1080/13621718.2017.1417782
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mg/Al dissimilar joints with favourable static and dynamic mechanical properties were obtained utilising ultrasonic spot welding and ultrasonic spot weld bonding technology. The fatigue behaviour, fatigue failure mode, and typical fatigue fracture surface morphology of Mg/Al ultra-sonic spot welding and ultrasonic spot weld bonding joints were compared and observed to get a better understanding of the fatigue failure mechanism. In general, the Mg/Al ultrasonic spot weld bonding joint exhibited better fatigue performance than the ultrasonic spot welding joint. The two kinds of joints presented different fatigue failure modes with decreasing applied load level. A fatigue life prediction model was established, and the fatigue life prediction results were in good agreement with the experimental fatigue results.
引用
收藏
页码：487 / 500
页数：14
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