Some issues on structural integrity analysis of P91 welds in power plants subjected to high temperature creep
ABSTRACT Welds are metallurgically complex, with heterogeneous structures within the weld metal and heat‐affected zones. In order to carry out a structural integrity assessment, it is important to have knowledge of the initial metallurgical features and the associated material property variations so...
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Published in: | Fatigue & fracture of engineering materials & structures Vol. 32; no. 11; pp. 926 - 935 |
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Main Authors: | , , , |
Format: | Journal Article |
Language: | English |
Published: |
Oxford, UK
Blackwell Publishing Ltd
01-11-2009
Blackwell Wiley Subscription Services, Inc |
Subjects: | |
Online Access: | Get full text |
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Summary: | ABSTRACT
Welds are metallurgically complex, with heterogeneous structures within the weld metal and heat‐affected zones. In order to carry out a structural integrity assessment, it is important to have knowledge of the initial metallurgical features and the associated material property variations so that it is possible to accurately model all the possible failure modes of welds using, for example, numerical techniques. This paper describes some fundamental issues concerning a holistic process for high temperature performance and failure prediction assessment of power plant welds. This includes welding process simulation and residual stress determination, microstructural evolution and the formulation of creep damage mechanics constitutive equations including weld metal anisotropy. Typical examples, from specific case studies for P91 welds, are used to illustrate the application. Future requirements for development of high temperature assessment methods for welds are suggested. |
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Bibliography: | ark:/67375/WNG-RB8RJKS1-9 ArticleID:FFE1397 This paper is based on a presentation at the ESIA9 Conference in Beijing, October 2007. istex:D89D4CA88F284D345C3DCDF7E7400038ED598535 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 8756-758X 1460-2695 |
DOI: | 10.1111/j.1460-2695.2009.01397.x |