Evaluation of the Creep-Fatigue Crack Propagation Rate of 2 1/4 Cr-1Mo Steel

Isamu Nonaka, Masaki Kitagawa, Yusaku Wada

Research output: Contribution to journalArticlepeer-review

Abstract

A series of experiments were performed in order to clarify creep-fatigue crack propagation behavior and also to identify the parameter that characterizes the crack growth rate of 2 1/4 Cr-1 Mo steel at 500°C. The following results were obtained (1) Under cyclic loading with tensile load hold, the creep crack propagation during the tensile load hold was dominant. (2) While the crack growth rate was steady during the tensile load hold, the crack opening displacement increased radically right after the load hold started and afterwards increased steadily to the end of the tensile load hold. The radical increase of the crack opening displacement right after the tensile load hold was found not to be due to the crack growth. (3) The creep-fatigue crack propagation rate was characterized by the creep J-integral range calculated from the steady increase of the crack opening displacement during the tensile load hold, as is shown by Eq. (1) in the text.

Original languageEnglish
Pages (from-to)2108-2112
Number of pages5
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume55
Issue number518
DOIs
Publication statusPublished - 1989

Keywords

  • 2 1/4 Cr-1Mo Steel
  • Crack Opening Displacement
  • Crack Propagation
  • Creep J-integral Range
  • Fracture Creep-Fatigue

ASJC Scopus subject areas

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

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