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Science and Technology of Welding and Joining Volume 24, 2019 - Issue 2
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Research Articles

Study of resistance spot weldability of a new stainless steel

Q. B. FengShanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;Innovation & Entrepreneurship Engineering Training Center, Shanghai University of Electric Power, Shanghai, People’s Republic of ChinaView further author information
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Y. B. LiShanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaCorrespondence[email protected]
View further author information
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B. E. CarlsonManufacturing Systems Research Lab, General Motors Research & Development Center, Warren, MI, USAView further author information
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X. M. LaiShanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaView further author information
Pages 101-111 | Received 08 May 2018, Accepted 05 Jun 2018, Published online: 02 Jul 2018
 
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ABSTRACT

The weldability of a newly developed stainless steel was investigated by comparing with hot-dipped galvanised dual phase and low carbon steels in a two-sheet stack-up of similar metal. The weld lobes, mechanical properties, weld morphology, microstructures and microhardness profiles of the welds made with the three materials were comparatively discussed. Results showed that significant softening was observed in the stainless steel weld nugget. Compared to the dual phase steel and low carbon steel, the stainless steel has a very narrow weld lobe but requires lower welding current and shorter welding time, and the stainless steel weld performed better mechanical properties in the case of welds with same nugget size, but it tended to exhibit interfacial fracture in tensile shear tests.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors would like to acknowledge the supports of GM Research and Development Center, National Natural Science Foundation of China [grant number U1764251], [grant number U1564204], and [grant number 51322504], and the contribution of the H1000 steel by Outokumpu Group.

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