STP1366

    Interaction of Void-Induced Phase Instability and Subsequent Void Growth in AISI 304 Stainless Steel

    Published: Jan 2000


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    Abstract

    There are two types of radiation-induced phase instabilities that AISI 304 is prone to develop at temperatures in the 400–550°C range at dpa rates typical of fast reactors, and there is some concern that these instabilities may shift to lower temperatures (≥400°C) at lower dpa rates typical of pressurized water reactors.

    One of these instabilities, the void-induced γ→α transformation, is investigated in this study at dpa rates typical of both types of reactors. The mode of nickel segregation shifts somewhat at PWR-relevant conditions, but the γ→α transformation has not yet been observed in the range 380–400°C for swelling levels less than 2%.

    Keywords:

    AISI 304, AISI 304L, void swelling, embrittlement, ferrite, displacement rate


    Author Information:

    Porter, DL
    Senior Metallurgical Engineer, Argonne National Laboratory-West, Idaho Falls, ID

    Garner, FA
    Senior Staff Scientist, Pacific Northwest National Laboratory, Richland, WA

    Bond, GM
    Associate Professor, New Mexico Institute of Mining and Technology, Socorro, NM


    Paper ID: STP12439S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP12439S


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