Critical grain size to limit the hydrogen-induced ductility drop in a metastable austenitic steel

Arnaud Macadre, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)

    Abstract

    The metastable austenitic stainless steel is Fe-16Cr-10Ni, of which the grain size can be controlled between 1 and 21 μm. Hydrogen precharging causes a critical drop in ductility during tensile tests for the largest grain size (21 μm). In order to understand how efficient grain refinement is against hydrogen-induced ductility reduction, by varying the heat treatment conditions, it was possible to manufacture six different grain sizes and pinpoint the grain size at which the drop of ductility is critical. This change in ductility was associated with a transition from fully ductile fracture surface to a fracture surface composed of dimples, quasi-cleavages and intergranular fracture.

    Original languageEnglish
    Pages (from-to)10697-10703
    Number of pages7
    JournalInternational Journal of Hydrogen Energy
    Volume40
    Issue number33
    DOIs
    Publication statusPublished - Sep 7 2015

    All Science Journal Classification (ASJC) codes

    • Renewable Energy, Sustainability and the Environment
    • Fuel Technology
    • Condensed Matter Physics
    • Energy Engineering and Power Technology

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