• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2022, Vol. 58 ›› Issue (10): 51-58.doi: 10.3901/JME.2022.10.051

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Study of Influences of Groove Type on Welding Residual Stress Evolution in Bimetallic Clad Plate Joints during Multi-layer and Multi-pass Welding

ZHU Min1, ZHENG Qiao2, WU Wei2, QIAN Weifang2, XIA Liqian2, ZHANG Yansong1, WANG Baosen2   

  1. 1. Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures, Shanghai Jiao Tong University, Shanghai 200240;
    2. Baosteel Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201900
  • Received:2021-05-07 Revised:2021-11-13 Online:2022-05-20 Published:2022-07-07

Abstract: The 13 mm-thick Incoloy825/X52 bimetallic clad plates were prepared by TIG welding. Both finite element method and experimental means were conduct to study the residual stress distribution characteristics during multi-layer and multi-pass welding of plates with different groove types. The results show that for the bimetallic composite plate, the highest stress concentration area is always located at transition seam layer with a long strip distribution profile no matter which type of groove is applied. The changes of groove types have limited effects on the profile and peak value of both internal and surficial high residual stress region. The evolution of residual stress inside the joints shows that the highest stress concentration region in transition layer will not generate until all base, transition and flyer seam layers welding are finished. Besides, the final weld plays a decisive role in the formation of final residual stress state. It will have a strong “pulling” effect on residual stress distribution and make the final stress distribute asymmetrically.

Key words: bimetallic clad plate, finite element, groove type, residual stress

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