Influence of PWHT on the Residual Stress in Under-Matching Welded Joint

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...

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Bibliographic Details
Published inProcedia engineering Vol. 130; pp. 966 - 972
Main Authors Qian, Y.W., Zhao, J.P.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2015
Subjects
PWHT
residual stress
under-matching
residual stress
under-matching
PWHT
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Summary: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 influence of PWHT on the residual stress in the under-matching welded joint is based on the experimental verification. The results show that PWHT can reduce the residual stress in the under-matching welded joint significantly, especially the lower transverse stress than the longitudinal stress. The influence on the under-matching welded joint is equal to that on the equal-matching welded joint.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2015.12.249