Improved microstructure and performance of thick-walled 316L stainless steel joint by NG-GTAW with auxiliary magnetic field

Fuxiang Li; Yibo Liu; Haoyu Kong; Qi Sun; KeXin Kang; Qingjie Sun

Journal of Materials Research and Technology (Nov 2022)

Improved microstructure and performance of thick-walled 316L stainless steel joint by NG-GTAW with auxiliary magnetic field

Fuxiang Li,
Yibo Liu,
Haoyu Kong,
Qi Sun,
KeXin Kang,
Qingjie Sun

Affiliations

Fuxiang Li: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No.92 West Dazhi Street, Harbin 150001, China; Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, No.2 Wenhuaxi Road, Weihai 264209, China
Yibo Liu: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No.92 West Dazhi Street, Harbin 150001, China; Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, No.2 Wenhuaxi Road, Weihai 264209, China; Corresponding author.
Haoyu Kong: Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, No.2 Wenhuaxi Road, Weihai 264209, China
Qi Sun: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No.92 West Dazhi Street, Harbin 150001, China; Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, No.2 Wenhuaxi Road, Weihai 264209, China
KeXin Kang: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No.92 West Dazhi Street, Harbin 150001, China; Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, No.2 Wenhuaxi Road, Weihai 264209, China
Qingjie Sun: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No.92 West Dazhi Street, Harbin 150001, China; Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, No.2 Wenhuaxi Road, Weihai 264209, China; Corresponding author.

Journal volume & issue: Vol. 21
pp. 3038 – 3050

Abstract

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Thick-walled 316L stainless steel (SS) was successfully welded by magnetic field assisted arc oscillation narrow gap GTAW (gas tungsten arc welding). The microstructure and weld performance of thick-walled 316 SS joints with and without arc oscillation were reported. The results indicated that the solute segregation of 316L SS welded joints was improved, ferrite content was significantly reduced, and the overall grain size was also refined under the action of arc oscillation, which may be mainly attributed to the uniform temperature and the reduced cooling rate resulting from the application of magnetic field. Furthermore, the growth direction of the columnar grain in the weld was changed and the texture characteristic of the grain was weakened with arc oscillation. Consequently, the strength and plasticity of the weld were improved synergistically. Based on the SEM and EBSD analysis, the enhanced corrosion resistance of selected position in the joint also was evaluated by weighing the solute segregation, phase proportion and grain boundary characteristic.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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