The influence of creep-fatigue interaction on high temperature crack growth in 316 steel weldments

C. M. Davies, David W. Dean, A. N. Mehmanparast, K. M. Nikbin

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)

Abstract

High temperature crack growth in weldments is of great concern and generally occurs along the boundary between the heat affected zone (HAZ) and parent material (PM) of welded components in high temperature plants. Static creep and low frequency cyclic crack growth tests have been performed on compact tension, C(T), specimens manufactured from sections taken from a 316 steel weldment at 550°C, where the crack tip was located along the fusion line within the HAZ. The data has been analyzed in terms of both the creep-brittle and creep-ductile crack tip parameters, K and C*, respectively. The cyclic test results have been compared to static creep crack growth tests on 316 steel weldments and homogeneous parent material specimens, and to crack growth models. The cracking rates of the cyclic crack growth tests are found to be higher than that of the of the static load creep crack growth tests on weldments. The data may be bounded by the high frequency fatigue and the static load creep crack growth predictions. However, further work is required to establish the fatigue and subsequently the creep component of the cyclic load crack growth tests on weldments.

Original languageEnglish
Title of host publicationASME 2009 Pressure Vessels and Piping Conference
Subtitle of host publicationVolume 6: Materials and Fabrication, Parts A and B
Place of PublicationNew York, NY
Pages1491-1502
Number of pages12
DOIs
Publication statusPublished - 9 Jul 2010
Externally publishedYes
Event2009 ASME Pressure Vessels and Piping Conference - Prague, Czech Republic
Duration: 26 Jul 200930 Jul 2009

Publication series

NamePressure Vessels and Piping Conference
ISSN (Print)0277-027X

Conference

Conference2009 ASME Pressure Vessels and Piping Conference
Country/TerritoryCzech Republic
CityPrague
Period26/07/0930/07/09

Keywords

  • creep fatigue
  • fracture
  • high temperature
  • steel
  • stress
  • britleness
  • cracking
  • heat
  • tension

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