Grain refinement of nickel-free high nitrogen austenitic stainless steel by reversion of eutectoid structure

Nobuo Nakada, Naoki Hirakawa, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review

    49 Citations (Scopus)

    Abstract

    For the purpose of austenite grain refinement, a two-step phase transformation was applied to nickel-free austenitic stainless steel (Fe-25Cr-1 N mass% alloy): first, the austenitic steel was subjected to isothermal heat treatment at around 1200 K to make the austenite decompose, which results in the formation of (ferrite + Cr2N) lamellar structure. The specimen with eutectoid structure was then reversed to austenite by heating. In addition, the grain refinement mechanism was discussed in terms of the nucleation of the reversed austenite.

    Original languageEnglish
    Pages (from-to)153-156
    Number of pages4
    JournalScripta Materialia
    Volume57
    Issue number2
    DOIs
    Publication statusPublished - Jul 2007

    All Science Journal Classification (ASJC) codes

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

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