Temperature dependence of austenite nucleation site on reversion of lath martensite

Nobuo Nakada, Toshihiro Tsuchiyma, Setsuo Takaki, Naoki Miyano

    研究成果: 書籍/レポート タイプへの寄稿会議への寄与

    3 被引用数 (Scopus)

    抄録

    The temperature dependence of austenite nucleation behavior within lath martensitic structure was investigated in an ultralow carbon 13%Cr-6%Ni martensitic stainless steel partially reversed at (austenite + ferrite) two phase region. The shape and nucleation site of the reversed austenite grains were varied depending on the reversion temperature; fine acicular austenite grains frequently formed along the lath boundaries at a temperature lower than 915 K, while the granular ones tended to nucleate mainly on the prior austenite grain boundaries at a higher temperature. In order to explain the temperature dependence of nucleation site transition, the difference in energetics of austenite nucleation between the lath boundary and the prior austenite grain boundary was discussed on the basis of the classical nucleation theory and FEM analysis. The calculation of the changes in interfacial energy and elastic strain for austenite nucleation suggested that the lath boundary acts as more preferential nucleation sites for austenite rather than the prior austenite grain boundary to reduce the increment of elastic strain when the reversion temperature is low.

    本文言語英語
    ホスト出版物のタイトルTHERMEC 2009
    ページ3424-3429
    ページ数6
    DOI
    出版ステータス出版済み - 2月 9 2010
    イベント6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, ドイツ
    継続期間: 8月 25 20098月 29 2009

    出版物シリーズ

    名前Materials Science Forum
    638-642
    ISSN(印刷版)0255-5476

    その他

    その他6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
    国/地域ドイツ
    CityBerlin
    Period8/25/098/29/09

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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