The effect of prior cold-work on the deformation behaviour of neutron irradiated AISI 304 austenitic stainless steel

Wade Karlsen (Corresponding Author), S. Van Dyck

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)

    Abstract

    Cold-work is intentionally employed to increase the yield strength of austenitic stainless steels and also occurs during fabrication processes, but it has also been associated with greater incidence of stress corrosion cracking. This study examined the effect of up to 3.85 dpa neutron irradiation on the deformation behaviour and microstructures of 30% cold-worked AISI 304 material tensile tested at 300 °C. While the deformation behaviour of 0.07 dpa material was similar to non-irradiated material tested at the same temperature, its stress–strain curve was shifted upwards by about 200 MPa. Materials irradiated to over 2 dpa hardened some 400–500 MPa, but showed limited strain hardening capacity, exhibiting precipitous softening with further straining beyond the yield point. The observed behaviour is most likely a consequence of planar deformation products serving as strengtheners to the unirradiated bulk on the one hand, while promoting strain localization on the other, behaviour exacerbated by the subsequent neutron irradiation.
    Original languageEnglish
    Pages (from-to)127-137
    Number of pages11
    JournalJournal of Nuclear Materials
    Volume406
    Issue number1
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

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    austenitic stainless steels
    Austenitic stainless steel
    Neutrons
    neutrons
    Neutron irradiation
    neutron irradiation
    stress corrosion cracking
    strain hardening
    yield point
    yield strength
    Stress corrosion cracking
    Strain hardening
    softening
    Yield stress
    incidence
    Fabrication
    microstructure
    Microstructure
    fabrication
    curves

    Cite this

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    abstract = "Cold-work is intentionally employed to increase the yield strength of austenitic stainless steels and also occurs during fabrication processes, but it has also been associated with greater incidence of stress corrosion cracking. This study examined the effect of up to 3.85 dpa neutron irradiation on the deformation behaviour and microstructures of 30{\%} cold-worked AISI 304 material tensile tested at 300 °C. While the deformation behaviour of 0.07 dpa material was similar to non-irradiated material tested at the same temperature, its stress–strain curve was shifted upwards by about 200 MPa. Materials irradiated to over 2 dpa hardened some 400–500 MPa, but showed limited strain hardening capacity, exhibiting precipitous softening with further straining beyond the yield point. The observed behaviour is most likely a consequence of planar deformation products serving as strengtheners to the unirradiated bulk on the one hand, while promoting strain localization on the other, behaviour exacerbated by the subsequent neutron irradiation.",
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    The effect of prior cold-work on the deformation behaviour of neutron irradiated AISI 304 austenitic stainless steel. / Karlsen, Wade (Corresponding Author); Van Dyck, S.

    In: Journal of Nuclear Materials, Vol. 406, No. 1, 2010, p. 127-137.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - The effect of prior cold-work on the deformation behaviour of neutron irradiated AISI 304 austenitic stainless steel

    AU - Karlsen, Wade

    AU - Van Dyck, S.

    PY - 2010

    Y1 - 2010

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    AB - Cold-work is intentionally employed to increase the yield strength of austenitic stainless steels and also occurs during fabrication processes, but it has also been associated with greater incidence of stress corrosion cracking. This study examined the effect of up to 3.85 dpa neutron irradiation on the deformation behaviour and microstructures of 30% cold-worked AISI 304 material tensile tested at 300 °C. While the deformation behaviour of 0.07 dpa material was similar to non-irradiated material tested at the same temperature, its stress–strain curve was shifted upwards by about 200 MPa. Materials irradiated to over 2 dpa hardened some 400–500 MPa, but showed limited strain hardening capacity, exhibiting precipitous softening with further straining beyond the yield point. The observed behaviour is most likely a consequence of planar deformation products serving as strengtheners to the unirradiated bulk on the one hand, while promoting strain localization on the other, behaviour exacerbated by the subsequent neutron irradiation.

    U2 - 10.1016/j.jnucmat.2010.01.028

    DO - 10.1016/j.jnucmat.2010.01.028

    M3 - Article

    VL - 406

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    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

    SN - 0022-3115

    IS - 1

    ER -