Modeling crack initiation and propagation in nickel base superalloys

Alexander M. Korsunsky, Xu Song, Jonathan Belnoue, Leo D.G. Prakash, Daniele Dini, Michael J. Walsh

Research output: Contribution to journalArticlepeer-review

Abstract

Nickel base superalloys are the primary class of materials used in the manufacture of high temperature components for gas turbine aeroengines, including combustion casings and liners, guide vane and turbine blades and discs, etc. These components are subjected to complex cyclic loading induced by the combination of mechanical loading, changing temperatures and thermal gradients, inducing plastic deformation and creep, that ultimately may lead to crack initiation and propagation. The purpose of the present paper is to provide a necessarily brief overview of recent modeling activities in this field, including polycrystalline crystal plasticity modeling for the study of crack initiation, coupled non-local damage-plasticity modeling for crack initiation and propagation studies, and the incorporation of time and environment dependent processes (creep and oxidation) in the predictive modeling of fatigue crack growth rates in nickel base superalloys.

Original languageEnglish
Pages (from-to)53-56
Number of pages4
JournalKey Engineering Materials
Volume348-349
DOIs
Publication statusPublished - 2007
Externally publishedYes

Keywords

  • Crack initiation
  • Crack propagation
  • Creep
  • Crystal plasticity
  • Damage
  • Nickel base superalloys

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