Work-hardening mechanism in high-nitrogen austenitic stainless steel

Takuro Masumura, Yuki Seto, Toshihiro Tsuchiyama, Ken Kimura

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    The remarkably high work-hardening rate in high-nitrogen austenitic stainless steels is generally believed to be due to the promotion of dislocation accumulation by nitrogen addition. However, analysis of dislocation accumulation behavior by the modified Williamson-Hall/ Warren-Averbach method reveals that no difference to the increment of the dislocation density during deformation exists between austenitic steels with and without nitrogen. Since cross slipping is markedly suppressed in high-nitrogen steels, the moving dislocations are back-stressed by the planar dislocation arrays. This induces the deformation resistance and the high work-hardening rate.

    Original languageEnglish
    Pages (from-to)678-684
    Number of pages7
    JournalMaterials Transactions
    Volume61
    Issue number4
    DOIs
    Publication statusPublished - 2020

    All Science Journal Classification (ASJC) codes

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

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