Microscopic characterization of hydrogen-induced quasi-brittle fatigue fracture in low-strength carbon steel

Yoshimasa Takahashi, Hideaki Nishikawa, Yasuji Oda, Hiroshi Noguchi

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14 Citations (Scopus)

Abstract

The microscopic feature of hydrogen-induced quasi-brittle fatigue fracture in low-strength carbon steel was investigated by transmission electron microscopy and electron backscatter diffraction. These analyses, aided also by fractography, explicitly revealed the following points; i) brittle striation is formed by extensive slip at the crack tip, ii) quasi-brittle facet is not crystallographically related to the {100} cleavage plane, and iii) crack growth process is stable. These results may suggest that the crack growth, despite its brittle appearance, is essentially a combined process of extensive slip and significantly localized ductile cracking, which is distinct from the normal slip-off growth mechanism.

Original languageEnglish
Pages (from-to)2416-2419
Number of pages4
JournalMaterials Letters
Volume64
Issue number22
DOIs
Publication statusPublished - Nov 30 2010

All Science Journal Classification (ASJC) codes

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

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