A crystal plasticity-based approach for creep-fatigue life prediction and damage evaluation in a nickel-based superalloy

Kai Shang Li, Run Zi Wang, Guang Jian Yuan, Shun Peng Zhu, Xian Cheng Zhang, Shan Tung Tu, Hideo Miura

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A numerical process based on crystal plasticity finite element (CPFE) was implemented to predict creep-fatigue crack initiation life. CPFE-based model can describe the macroscopic cyclic deformation and reveal grain-level damage mechanism. A new life prediction approach was then constructed by introducing fatigue and creep indicator parameters. Furthermore, a series of strain-controlled creep-fatigue tests in GH4169 superalloy at 650℃ were used to validate predicted accuracy of this model, where most of the data points lied within ±1.5 error band. Finally, a potential methodology for conservative creep-fatigue life evaluation was provided by flexible creep-fatigue damage summation rule in engineering applications.

Original languageEnglish
Article number106031
JournalInternational Journal of Fatigue
Volume143
DOIs
Publication statusPublished - 2021 Feb

Keywords

  • Creep-fatigue
  • Crystal plasticity
  • Damage diagram
  • Life prediction

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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