STP955

    Precipitate Evolution in Type 316 Stainless Steels Irradiated in EBR-II

    Published: Jan 1987


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    Abstract

    The irradiation temperature and fluence dependences of precipitates formed in Type 316 stainless steels with and without titanium have been studied for specimens irradiated over a fluence range of 3 × 1026 to 25 × 1026 n/m2 (E > 0.1 MeV) and a temperature range of 370 to 730°C. A precipitate formation diagram using irradiation temperature and fluence as the two coordinates is constructed. The composition of M6C is found to be irradiation temperature dependent. The composition of Laves is found to be both irradiation temperature and fluence dependent. The variable composition behavior of the precipitates, M6C and Laves, during irradiation is discussed in terms of nonequilibrium segregation and the radiation-induced off-stoichiometric characteristics of the precipitates.

    Keywords:

    precipitates, AISI 316 stainless steel, stainless steels, irradiation effects


    Author Information:

    Yang, WJS
    Lead engineer, Knolls Atomic Power Laboratory, Schenectady, NY


    Paper ID: STP33848S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP33848S


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