Computational and experimental studies of high temperature crack growth in the presence of residual stress

Noel P. O'Dowd, Kamran M. Nikbin, Farid R. Biglari, Robert C. Wimpory, Manus P. O'Donnell

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Residual stresses have been introduced into a notched compact tension specimen of a 347 weld material by mechanical compression. The required level of compressive load has previously been determined from finite element studies. The residual stresses in the vicinity of the notch root have been measured using neutron diffraction and the results compared with those obtained from finite element analysis. The effect of stress redistribution due to creep has been examined and it is found that significant reduction in stress is measured after 1000 hours at 650°C. The implications of these results with regard to the development of damage in the specimen due to creep relaxation are examined.

Original languageEnglish
Title of host publicationProceedings of 2006 ASME Pressure Vessels and Piping Division Conference - ASME PVP2006/ICPVT-11 Conference - Pressure Vessel Technologies for the Global Community
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventASME PVP2006/ICPVT-11 Conference - Vancouver, BC, Canada
Duration: 23 Jul 200627 Jul 2006

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume2006
ISSN (Print)0277-027X

Conference

ConferenceASME PVP2006/ICPVT-11 Conference
Country/TerritoryCanada
CityVancouver, BC
Period23/07/0627/07/06

Keywords

  • Creep crack initiation
  • Fracture
  • High temperature
  • Residual stress

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