Multi-scale observation of hydrogen-induced, localized plastic deformation in fatigue-crack propagation in a pure iron

Yuhei Ogawa, Domas Birenis, Hisao Matsunaga, Annett Thøgersen, Øystein Prytz, Osamu Takakuwa, Junichiro Yamabe

研究成果: ジャーナルへの寄稿学術誌査読

55 被引用数 (Scopus)

抄録

In order to study the influence of hydrogen on plastic deformation behavior in the vicinity of the fatigue crack-tip in a pure iron, a multi-scale observation technique was employed, comprising electron channeling contrast imaging (ECCI), electron back-scattered diffraction (EBSD) and transmission electron microscopy (TEM). The analyses successfully demonstrated that hydrogen greatly reduces the dislocation structure evolution around the fracture path and localizes the plastic flow in the crack-tip region. Such clear evidence can reinforce the existing model in which this type of localized plasticity contributes to crack-growth acceleration in metals in hydrogen atmosphere, which has not yet been experimentally elucidated.

本文言語英語
ページ(範囲)13-17
ページ数5
ジャーナルScripta Materialia
140
DOI
出版ステータス出版済み - 11月 2017

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 金属および合金

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