Effect of pre-strain on low cycle fatigue strength of austenitic stainless steel SUS316NG

Shota Hasunuma, Yohei Miyata, Takeshi Ogawa, Kenichi Sakaue

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Low cycle fatigue tests were performed for austenitic stainless steel, SUS3 16NG. The effect of pre-strain history on the crack growth was investigated in detail using cellulose acetate itplicas. In strain range, As = 2.5 % and 8 % constant tests, cracks initiated from slip bands near grain boundary, while intergranular crack initiations were prevailing when As = 16 % constant test. The cracks grew with several coalescences until the final fracture. Pre-strains were applied at As = 8 or 16 % followed by fatigue loading at As =2.5 %.These tests revealed that contribution of cyclic strain hardening and sofiening were remarkable depending on the pre-strain history. Crack growth characteristics were well evaluated by J integral range, Al, which is an elasto-plastic fracture mechanics parameter Crack growth characteristic under As-constant tests as well as the pre-strained tests coincided with that measuitd by fracture mechanics experiment. Fatigue crack growth rates were predicted by elasto-plastic fracture mechanics approach in conjunction with cyclic stress-strain response.

Original languageEnglish
Pages (from-to)843-851
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume77
Issue number777
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

Austenitic stainless steel
Fracture mechanics
Crack propagation
Fatigue of materials
Plastics
Cracks
Fatigue crack propagation
Coalescence
Strain hardening
Crack initiation
Cellulose
Grain boundaries
Fatigue strength
Experiments

Keywords

  • Austeintic Stainless Steel
  • Crack Initiation
  • Crack Propagation
  • Cumulative Damage Rule
  • J integral
  • Low Cycle Fatigue
  • Pre-Strain History

ASJC Scopus subject areas

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

Cite this

Effect of pre-strain on low cycle fatigue strength of austenitic stainless steel SUS316NG. / Hasunuma, Shota; Miyata, Yohei; Ogawa, Takeshi; Sakaue, Kenichi.

In: Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 77, No. 777, 2011, p. 843-851.

Research output: Contribution to journalArticle

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