Creep-Fatigue Intergranular Fracture of Inner Cracking Type in Type 304 Stainless Steel. Numerical Simulation on Initiation and Growth of Small Cracks

Naoya Tada, Takayuki Kitamura, Ryuichi Ohtani

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The most dangerous fracture of creep-fatigue is caused by multiple small cracks which initiate and grow inside of materials. In this study, a numerical simulation method is proposed on the initiation and growth of inner small cracks on the basis of the experimental observation of a Type 304 stainless steel during creep-fatigue in order to elucidate the evolution process of damage. The model proposed in this study is similar to that for creep-fatigue intergranular fracture of surface cracking type which has already been reported by the authors. It is based on a discrete model of grain boundaries having random shape and sizes with random fracture resistances and a Monte Carlo simulation combined with a damage mechanics concept. As a result, the spatial and temporal distributions of inner small cracks are successfully evaluated by the simulation.

Original languageEnglish
Pages (from-to)84-89
Number of pages6
Journaljournal of the society of materials science, japan
Volume44
Issue number496
DOIs
Publication statusPublished - 1995
Externally publishedYes

Keywords

  • Crack growth
  • Crack initiation
  • Creep
  • High temperature fatigue
  • Inner small crack
  • Monte Carlo simulation
  • Type 304 stainless steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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