Manifestations of DSA in austenitic stainless steels and inconel alloys (1-2013)

Mykola Ivanchenko, Yuriy Yagodzinskyy, Ulla Ehrnsten, Wade Karlsen, Hannu Hänninen

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    Abstract

    Interstitial atoms such as carbon and nitrogen play an important role in the
    mechanical properties of austenitic stainless steels and Inconel alloys. Strength
    and creep resistance of these alloys in the environmental conditions of nuclear
    reactors depend on the amount, state and diffusion mobility of interstitial atoms
    dissolved in the alloy. Because of the interaction of carbon and nitrogen with
    mobile dislocations, even a minor content in the solid solution results in dynamic
    strain aging (DSA) of the alloys at temperatures above 200 oC [1 - 3]. DSA is manifested by negative strain rate sensitivity, and serrated yielding during straining at elevated temperatures and results often in a remarkable degradation of mechanical properties. DSA phenomenon leads to inhomogeneous plastic flow, which results in strain localization that can affect crack initiation and propagation.
    Original languageEnglish
    Title of host publication20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20
    Subtitle of host publicationBook of abstracts
    EditorsSeppo Vuori, Rauno Rintamaa
    PublisherVTT Technical Research Centre of Finland
    Pages57-59
    Volume1
    ISBN (Electronic)978-951-38-6338-8
    ISBN (Print)978-951-38-6337-1
    Publication statusPublished - 2009
    MoE publication typeNot Eligible
    Event20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20 - Espoo, Finland
    Duration: 9 Aug 200914 Aug 2009
    Conference number: 11

    Publication series

    SeriesVTT Symposium
    Number256
    ISSN0357-9387

    Conference

    Conference20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20
    Abbreviated titleSMiRT 20
    CountryFinland
    CityEspoo
    Period9/08/0914/08/09

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  • Cite this

    Ivanchenko, M., Yagodzinskyy, Y., Ehrnsten, U., Karlsen, W., & Hänninen, H. (2009). Manifestations of DSA in austenitic stainless steels and inconel alloys (1-2013). In S. Vuori, & R. Rintamaa (Eds.), 20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20: Book of abstracts (Vol. 1, pp. 57-59). VTT Technical Research Centre of Finland. VTT Symposium, No. 256 http://www.vtt.fi/inf/pdf/symposiums/2009/S256.pdf