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

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)102-106
    Number of pages5
    JournalScripta Materialia
    Volume166
    DOIs
    Publication statusPublished - Jun 2019

    All Science Journal Classification (ASJC) codes

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

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