期刊
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
卷 27, 期 2, 页码 84-91出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/13621718.2021.2013707
关键词
Resistance spot welding; dissimilar materials; external magnetic field; oxide film defects; intermetallic compound
资金
- National Natural Science Foundation of China [U1764251]
- State Key Laboratory of Mechanical System and Vibration [MSVZD202111]
Resistance spot welding of aluminum to steel with magnetic-assisted apparatus enhances the diffusion of metal particles and improves the quality of the weld joint, resulting in increased hardness and strength, and better ductility.
Resistance spot welding of aluminium to steel with magnetic-assisted apparatus was performed for the first time to understand the metallurgical joining mechanism in the melt region and at the material interface. The electromagnetic force promoted circular motion of the molten metal and accelerated the diffusion of Fe atoms to the aluminium sheet, which induced finer grains, thinner intermetallic compound layers, reduced interface defects, and elevated hardness of the resulting aluminium nugget. Coach peel tests revealed that welds made with an external magnetic field presented enhanced strength and ductility compared to welds made with no external magnetic field. The enhanced strength and ductility resulted in a transition of the fracture behaviour from brittle interfacial mode to ductile button pullout mode, and increased the peak load and the energy absorption by 90% and 1327%, respectively.
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