The Open UniversitySkip to content

Residual Stress Distributions in a P91 Steel-Pipe Girth Weld before and after Post Weld Heat Treatment

Paddea, S.; Francis, J. A.; Paradowska, A M; Bouchard, P. J. and Shibli, I. A. (2012). Residual Stress Distributions in a P91 Steel-Pipe Girth Weld before and after Post Weld Heat Treatment. Materials Science and Engineering A, 534 pp. 663–672.

Full text available as:
Full text not publicly available
Due to copyright restrictions, this file is not available for public download
DOI (Digital Object Identifier) Link:
Google Scholar: Look up in Google Scholar


In this study the residual stresses in a pipe girth weld in a ferritic-martensitic power plant steel were measured by neutron diffraction and compared with the corresponding metallurgical zones in the weld region. It was found that, in both the as-welded and post-weld heat treated condition, the highest tensile stresses resided near the outer boundary of the heataffected zone (HAZ), and towards the weld root region. Substantial tensile direct and hydrostatic stresses existed across the HAZ, including the fine-grained and intercriticallyannealed regions, where premature type IV creep failures manifest in 9-12 Cr steel welds. Compressive stresses were found in the weld metal coinciding with the last weld bead to be deposited. Constrained cooling tests on test coupons illustrated that these compressive stresses can be explained in terms of the influence that solid-state phase transformations have on the accumulation of stress in welds.

Item Type: Journal Article
Copyright Holders: 2012 Materials Science and Engineering A
ISSN: 0921-5093
Academic Unit/Department: Mathematics, Computing and Technology
Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 31010
Depositing User: Anne Green
Date Deposited: 18 Jan 2012 09:30
Last Modified: 26 Feb 2016 13:26
Share this page:


Scopus Citations

▼ Automated document suggestions from open access sources

Actions (login may be required)

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340