The mechanism of hydrogen embrittlement on the basis of the interaction model of dislocations and hydrogen around a crack tip

A. T. Yokobori, S. Taketomi, J. C. Ha, T. Shoji, G. F. Li

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Mechanisms of dissolvent anodic chemical reaction and hydrogen embrittlement were proposed as stress corrosion cracking mechanics (SCC). The former is feasible for the case of plastic deformation dominant metals and the latter is for high strength metals such as high strength steels. However, in spite of low yield stress, a discontinuous cleavage-like fracture is sometimes observed during SCC for ductile fcc alloys. In this paper, we proposed stress corrosion cracking model on the basis of interaction of dislocation and hydrogen around a crack tip to predict discontinuous cleavage-like fracture during SCC for ductile fcc alloys. Furthermore, we conducted numerical analyses using this proposed model.

Original languageEnglish
Pages (from-to)95-109
Number of pages15
JournalStrength, Fracture and Complexity
Volume2
Issue number3
Publication statusPublished - 2004 Dec 1

Keywords

  • Cleavage-like fracture
  • Dislocation dynamics
  • Fcc alloys
  • Hydrogen embrittlement
  • Stress corrosion

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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