Hydrogen-induced phase transformations in thin specimen of an austenitic stainless steel

Seppo Tähtinen, Pertti Nenonen, Hannu Hänninen

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleScientificpeer-review

    Abstract

    Cathodic hydrogen charging is a commonly applied experimental technique when hydrogen effects in austenitic stainless steels are studied. The interpretation of the experimental results is, however, complicated due to effects of changing stress state and hydrogen concentration in thin surface layers. It is generally accepted that dissolved hydrogen expands the austenite lattice, stabilizes hexagonal structure relative to austenite and results in martensitic transformations. In addition to martensitic phases also metastable hydrogen-rich phases have been reported to form in electrochemically hydrogen charged stainless steels. Crystallographically the hydrogen-induced martensitic structures seem to resemble those of known stress- or strain-induced martensites although only a few detailed mechanistic or morphological studies are available.
    Original languageEnglish
    Title of host publicationChemistry and physics of fracture
    EditorsR.M. Latanision, R.H. Jones
    Place of PublicationDordrecht
    PublisherSpringer
    Pages568-573
    ISBN (Electronic)978-94-009-3665-2
    ISBN (Print)978-94-010-8140-5
    DOIs
    Publication statusPublished - 1987
    MoE publication typeA3 Part of a book or another research book

    Publication series

    SeriesNato Advanced Study Institutes Series E: Applied Sciences
    Volume130
    ISSN0168-132X

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