STP956

    Tensile Properties of Irradiated Pressure Vessel Steels

    Published: Jan 1987


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    Abstract

    Yield stress and hardness changes have been demonstrated to be strongly correlated to transition temperature shifts in nuclear pressure vessel steels, and hence such measurements can be a convenient means for evaluating the role of metallurgical and environmental variables in embrittlement. We have irradiated miniature tensile specimens of over 100 alloy (chemistry and thermomechanical treatment) variants at nominal fluxes 0.5 to 5 × 1016 n/m2·s, temperatures 271 to 325°C, and fluences 0.15 to 3 × 1023 n/m2. A subset of these specimens has been tested, and the results are reported here. For both commercial and model alloys, good agreement between hardness and yield stress changes were observed. Yield stress changes were strongly influenced by copper and nickel content and by thermomechanical treatment.

    Keywords:

    pressure vessel steels, embrittlement, tensile properties, radiation hardening


    Author Information:

    Lucas, GE
    Associate professor, professor, assistant research engineer, and senior development engineer, University of California, Santa Barbara, CA

    Robert Odette, G
    Associate professor, professor, assistant research engineer, and senior development engineer, University of California, Santa Barbara, CA

    Maiti, R
    Associate professor, professor, assistant research engineer, and senior development engineer, University of California, Santa Barbara, CA

    Sheckherd, JW
    Associate professor, professor, assistant research engineer, and senior development engineer, University of California, Santa Barbara, CA


    Paper ID: STP25663S

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP25663S


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