The under-matching welded joint is commonly used in engineering practice and the postweld heat treatment (PWHT) is the common method to reduce the residual stress in the welded joint, while the research on the under-matching welded joint after PWHT is few. The finite element software-ABAQUS is used to simulate the welding process and PWHT process of the under-matching welded joint which is the combination of CF62 (base metal) and 316L (weld) in this paper. The discussion of the influences of both overall and local PWHT on the residual stress in the under-matching welded joint is based on the experimental verification. And the influences of the two methods are compared to propose the better PWHT method to the under-matching welded joint. The results show that both overall and local PWHT can reduce the residual stress in the under-matching welded joint significantly, especially the lower transverse stress than the longitudinal stress. The distribution of the residual stress in the under-matching welded joint after the local PWHT is a little more uniform than that after the overall PWHT. The local PWHT is recommended to the under-matching welded joint in this paper.
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ASME 2015 Pressure Vessels and Piping Conference
July 19–23, 2015
Boston, Massachusetts, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5698-7
PROCEEDINGS PAPER
Influences of Overall and Local PWHT on Residual Stresses in the Under-Matching Welded Joints Available to Purchase
Yuwen Qian,
Yuwen Qian
Nanjing Tech University, Nanjing, China
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Jianping Zhao
Jianping Zhao
Nanjing Tech University, Nanjing, China
Search for other works by this author on:
Yuwen Qian
Nanjing Tech University, Nanjing, China
Jianping Zhao
Nanjing Tech University, Nanjing, China
Paper No:
PVP2015-45448, V005T09A012; 6 pages
Published Online:
November 19, 2015
Citation
Qian, Y, & Zhao, J. "Influences of Overall and Local PWHT on Residual Stresses in the Under-Matching Welded Joints." Proceedings of the ASME 2015 Pressure Vessels and Piping Conference. Volume 5: High-Pressure Technology; Rudy Scavuzzo Student Paper Competition and 23rd Annual Student Paper Competition; ASME NDE Division. Boston, Massachusetts, USA. July 19–23, 2015. V005T09A012. ASME. https://doi.org/10.1115/PVP2015-45448
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