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 journalArticle

7 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 1 2011

Fingerprint

Silicon alloys
silicon alloys
iron alloys
Iron alloys
Hydrogen
cracks
Crystalline materials
Cracks
Silicon steel
hydrogen
Crack tips
Plasticity
Crack propagation
striation
crack tips
Plastics
plastic properties
Kinetics
Geometry
plastics

All Science Journal Classification (ASJC) codes

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

Cite this

On the micromechanism of hydrogen-assisted cracking in a single-crystalline iron-silicon alloy thin sheet. / Takahashi, Yoshimasa; Yamaguchi, Keigo; Tanaka, Masaki; Higashida, Kenji; Noguchi, Hiroshi.

In: Scripta Materialia, Vol. 64, No. 6, 01.03.2011, p. 537-540.

Research output: Contribution to journalArticle

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AU - Noguchi, Hiroshi

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