On the micromechanism of hydrogen-assisted cracking in a single-crystalline iron-silicon alloy thin sheet

Yoshimasa Takahashi, Keigo Yamaguchi, Masaki Tanaka, Kenji Higashida, Hiroshi Noguchi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A microscopic analysis of sub-critical hydrogen-assisted cracking (HAC) in a single-crystalline iron-silicon thin sheet was conducted and revealed the following points: (i) crack tip geometry and crack growth unit (striation spacing) are constant even when crack length (i.e. apparent stress intensity) and crack velocity (da/dt) significantly change; and (ii) da/dt monotonically increases with plastic zone size. These findings suggest that the effect of large-scale plasticity on the rate-limiting process should be explicitly considered in the kinetic modeling of the HAC mechanism.

Original languageEnglish
Pages (from-to)537-540
Number of pages4
JournalScripta Materialia
Volume64
Issue number6
DOIs
Publication statusPublished - Mar 2011

All Science Journal Classification (ASJC) codes

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

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