High-Temperature Fatigue Crack Propagation under Cyclic Temperature

Ryuichi Ohtani, Takayuki Kitamura, Naoya Tada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In order to investigate crack propagation behavior of thermal fatigue on the basis of non-linear fracture mechanics, crack propagation tests were conducted for isothermal fatigue at several temperatures and for cyclic temperature fatigue. The results obtained were summarized as follows. (1) The fracture mechanics laws in isothermal fatigue dl/dN-ΔJf and dl/dN-ΔJc relations where dl/dN was crack propagation rate. ΔJf was fatigue J-integral range and ΔJc was creep J-integral range) showed little dependence on temperature. (2) A simple evaluation method of the values of ΔJf and ΔJc in thermal fatigue was proposed. (3) Crack propagation under cyclic temperature could be divided into two types which were cycle-dependent and time-dependent. dl/dN had good correlations with ΔJf and ΔJc for each type, respectively. (4) The transient condition between two types was given by a function of ΔJf and ΔJc. (5) The same fracture mechanics laws were obtained in isothermal and cyclic temperature fatigue.

Original languageEnglish
Pages (from-to)1030-1036
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume53
Issue number490
DOIs
Publication statusPublished - 1987

Keywords

  • Crack Propagation
  • Fracture Mechanics
  • J-Integral
  • Thermal Fatigue
  • dyclic Temperature Fatigue

ASJC Scopus subject areas

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

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