Effect of carbon on α′→γ reversion of metastable austenitic stainless steels

Kouki Tomimura, Manabu Oku, Setsuo Takaki, Youichi Tokunaga

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    7 Citations (Scopus)

    Abstract

    The effects of carbon on reversion behavior of metastable austenitic stainless steel were investigated using a 16.2% Cr- 8.8% Ni- 0.11% C steel. The steel used almost transforms to lath martensite (α′) from austenite (γ) by 90% cold rolling. The steel completely reverses on 923 K-10s annealing. However, isothermal α′ is produced on subsequent aging at room temperature (290 K) in case of more than 0.1 ks in 923 K isothermal annealing, and at 900 K and above in 0.6 ks isochronal annealing. In 923 K annealing, carbide precipitation occurred in preference to reversion. The carbide tends to retard a martensitic reversion and accelerated a diffusional reversion inversely. The grain size of γ reversed by a diffusional reversion at 923 K annealing is 0.2 μm dia. The carbide is effective for refining the grain by reversion.

    Original languageEnglish
    Pages (from-to)1186-1192
    Number of pages7
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume75
    Issue number7
    DOIs
    Publication statusPublished - 1989

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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