Effect of thermal ageing of CF8M on multi-axial ductility and application to fracture toughness prediction

J. Y. Jeon, Yun-Jae Kim, J. W. Kim, S. Y. Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper proposes a method to predict the thermal ageing effect on fracture toughness of CF8M cast stainless steel. The proposed method is based on multi-axial fracture strain combined with finite element damage analysis to simulate ductile tearing. Multi-axial fracture strain loci of un-aged and aged CF8M are determined by analyzing notched bar tensile test. It is shown that the thermal ageing effect on multi-axial fracture strain loci can be characterized by one constant. It is further shown that J-resistance curves of un-aged and aged CF8M can be predicted well from finite element damage analysis using multi-axial fracture strain loci. Implication of present results to practical application of crack assessment of aged cast stainless steels is discussed.

Original languageEnglish
Pages (from-to)1466-1477
Number of pages12
JournalFatigue and Fracture of Engineering Materials and Structures
Volume38
Issue number12
DOIs
Publication statusPublished - 2015 Dec 1

Keywords

  • cast stainless steel CF8M
  • finite element damage analysis
  • J-R curve prediction
  • multi-axial fracture strain locus

ASJC Scopus subject areas

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

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