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Science and Technology of Welding and Joining Volume 21, 2016 - Issue 6
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Original Articles

Effect of the axial external magnetic field on copper/aluminium arc weld joining

Y. B. LiuState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin150001, China;Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai264209, China
,
Q. J. SunState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin150001, China;Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai264209, ChinaCorrespondence[email protected]
,
H. WangState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin150001, China;Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai264209, China
,
H. M. ZhangCivil Engineering, Harbin Institute of Technology at Weihai, Weihai264209, China
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S. J. CaiShandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai264209, China
&
J. C. FengState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin150001, China;Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai264209, China
Pages 460-465 | Received 18 Sep 2015, Accepted 23 Nov 2015, Published online: 13 Apr 2016
 
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Abstract

Pure copper and aluminium alloy was joined by cold metal transfer welding with the assistance of an axial external magnetic field in this work. The results reveal that magnetic field led to a reduction of the average heat input and improved the wetting behaviour of the weld metal on the copper sheet surface. The thickness of the Al2Cu intermetallic compound layer formed at the interface was decreased from 50 µm for normal welding to 5 µm for the magnetic field-assisted welding process. The joint strength was observed to increase with the magnetic field. For a 21 mT and 10 Hz magnetic field, the maximum loading force reached up to 1.67 kN, resulting in an increase in joint strength by 33%.

Acknowledgements

This project is support by the National Natural Science Foundation of China (NSFC, Grant no. 51475104, 51435004) and the National Basic Research Program of China (2013CB035500).

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