Quantification of creep stresses within HAZ in welded branch junctions

ABSTRACT This paper quantifies the mismatch effect in creep properties on creep stresses in the heat‐affected zone of welded branches using systematic elastic‐creep finite element analysis. It is found that the section‐averaged normalized stresses in the heat‐affected zone can be uniquely characteri...

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Bibliographic Details
Published in:Fatigue & fracture of engineering materials & structures 2015-01, Vol.38 (1), p.113-124
Main Authors: Han, J.-J., Kim, Y.-J., Jerng, D. W., Nikbin, K., Dean, D.
Format: Article
Language:English
Subjects:
Alloys
Creep (materials)
Creep life assessment
creep mismatch
creep stresses
Fatigue failure
Finite element analysis
Finite element method
Heat affected zone
Materials creep
Mathematical analysis
Stresses
welded branch junctions
Welding
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Summary:ABSTRACT This paper quantifies the mismatch effect in creep properties on creep stresses in the heat‐affected zone of welded branches using systematic elastic‐creep finite element analysis. It is found that the section‐averaged normalized stresses in the heat‐affected zone can be uniquely characterized by the mismatch factor in creep. The relationship is almost linear and is not so sensitive to the loading condition. Implication to practical creep life assessment of welded branch components is discussed in the context of the R5 procedure.
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.12223