On the failure of surface damage to assess the hydrogen-enhanced deformation ahead of crack tip in a cyclically loaded austenitic stainless steel

Shuai Wang, Kelly E. Nygren, Akihide Nagao, Petros Sofronis, Ian M. Robertson

    研究成果: Contribution to journalArticle査読

    10 被引用数 (Scopus)

    抄録

    The influence of internal hydrogen on the plastic deformation ahead of a crack tip in a cyclically loaded austenitic stainless steel was determined through examination of the surface slip steps and dislocation structure. The slip steps failed to capture the totality of the sub-surface plasticity, causing the dimensions of the plastic zone generated in the presence of hydrogen to be underestimated. Regions in the hydrogen-charged steel that displayed no slip steps exhibited a similar dislocation structure to regions with slip steps in the uncharged steel. These observations are attributed to hydrogen-accelerating deformation processes and the rate of microstructure evolution.

    本文言語英語
    ページ(範囲)102-106
    ページ数5
    ジャーナルScripta Materialia
    166
    DOI
    出版ステータス出版済み - 6 2019

    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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