Alloy design for suppressing eutectoid reaction in high nitrogen austenitic steels

S. Takaki, N. Nakamura, H. Goto

    Research output: Contribution to journalConference articlepeer-review

    2 Citations (Scopus)

    Abstract

    In austenitic steels, nitrogen is an important alloying element in terms of phase balance, austenite stabilizing effect and solid solution hardening. In case a large amount of nitrogen is added to high chromium steels, austenitic stainless steels can be produced in Fe-Cr-N ternary alloys without nickel. For instance, Fe-23%Cr-0.9%N is just the composition which provides stable austenitic structure at room temperature. This alloy shows excellent mechanical properties; high yield stress, large work-hardening rate and good ductility. However, such excellent properties are guaranteed only on the condition that the alloy was quenched from an elevated temperature to avoid an eutectoid reaction; decomposition of austenite to Cr2N and ferrite, because eutectoid structure gives a harmful effect to the ductility of austenitic steels. In this paper, an alloy design for suppressing the eutectoid reaction was suggested and the effect of manganese addition to Fe-Cr-N ternary alloy was presented as an example.

    Original languageEnglish
    Pages (from-to)249-254
    Number of pages6
    JournalMaterials Science Forum
    Volume318
    DOIs
    Publication statusPublished - 1999
    EventProceedings of the 1998 5th International Conference on High Nitrogen Steels (HNS) - Stockholm, Swed
    Duration: May 27 1998May 28 1998

    All Science Journal Classification (ASJC) codes

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

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