Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1649782 | Materials Letters | 2010 | 4 Pages |
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.
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Authors
Yoshimasa Takahashi, Hideaki Nishikawa, Yasuji Oda, Hiroshi Noguchi,