Hydrogen-induced increase in phase stability in metastable austenite of various grain sizes under strain

Arnaud Macadre, Toshihiro Tsuchiyama, Setsuo Takaki

    研究成果: Contribution to journalArticle査読

    11 被引用数 (Scopus)

    抄録

    Martensitic transformation is a pressing issue in austenitic steels in the context of hydrogen embrittlement; strain-induced martensite formation may increase the level of hydrogen embrittlement in metastable austenite. Therefore, the effect of hydrogen on phase stability was investigated. An austenitic stainless steel with several grain sizes was charged with various hydrogen contents, and the mechanical stability of austenite under cold-rolling was studied. Grain size did not affect the amount of martensite formed in the material for any condition. Increasing hydrogen contents decreased the amount of strain-induced martensite at each tested strain. The results were confirmed with magnetization saturation, X-ray diffraction, and electron backscattered diffraction measurements. Hydrogen appears to both change the deformation mechanism and the martensite forming rate. The stabilization is caused by a lower population of martensite nucleation locations.

    本文言語英語
    ページ(範囲)3419-3428
    ページ数10
    ジャーナルJournal of Materials Science
    52
    6
    DOI
    出版ステータス出版済み - 3 1 2017

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 材料力学
    • 機械工学

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