A new parameter for prediction of creep crack growth rate at high temperature

T. Yokobori, H. Sakata, Yokobori Toshimitsu

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

By analysis based on a series of experimental data obtained by continuous observations using high temperature microscope during the creep test without interruption in vacuum of 10-5 mm Hg for the purpose of the crack length measurements, a new mathematical equation for prediction of high temperature creep crack growth rate has been proposed in terms of disposable parameters, that is α aeffσgg and temperature for 304 stainless steel within the range of αg and temperature concerned. It can be seen that it is the best one to fit the experimental data among any other formula proposed hitherto. The new parameter proposed herein 8.48 × 103 tlog10 α αeffαg 4.66 × 102 + 5.46log10αg where α = 1.98 +0.36 a w - 2.12 a w2 + 3.42 a w3, a≦0.7w may be used for characterizing the creep crack growth rate just similar as Larson-Miller parameter for the creep life.

Original languageEnglish
Pages (from-to)533-539
Number of pages7
JournalEngineering Fracture Mechanics
Volume13
Issue number3
DOIs
Publication statusPublished - 1980
Externally publishedYes

ASJC Scopus subject areas

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

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