Multiregion analysis of creep rupture data of 316 stainless steel

Kouichi Maruyama, Hassan Ghassemi Armaki, Kyosuke Yoshimi

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


A creep rupture data set of 316 stainless steel containing 319 data points at nine heats was subjected to a conventional single-region analysis and a multiregion analysis. In the former, the conventional Larson-Miller analysis was applied to the whole data set. In the latter, a data set of a single heat is divided into several data sets, so that the Orr-Sherby-Dorn (OSD) constant Q takes a unique value in each data set, and the conventional OSD analysis was applied to each divided data set. A region with a low value of Q appears in long-term creep of eight heats. Predicted values of the 105 h creep rupture stress of three heats were lower than the 99% confidence limit evaluated by the single-region analysis, suggesting that the single-region analysis is error prone. The multiregion analysis is necessary for the correct evaluation of the long-term creep properties of 316 stainless steel.

Original languageEnglish
Pages (from-to)171-176
Number of pages6
JournalInternational Journal of Pressure Vessels and Piping
Issue number3
Publication statusPublished - 2007 Mar


  • 316 stainless steel
  • Creep rupture life
  • Extrapolation of rupture life
  • Heat-to-heat variation
  • Time-temperature-parameter methods

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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