Effect of periodic temperature variations on the microstructure of neutron-irradiated metals

S.J. Zinkle, N. Hashimoto, D.T. Hoelzer, A.L. Qualls, T. Muroga, B.N. Singh

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Specimens of pure copper, a high purity austenitic stainless steel, and V–4Cr–4Ti were exposed to eight cycles of either constant temperature or periodic temperature variations during neutron irradiation in the High Flux Isotopes Reactor to a cumulative damage level of 4–5 displacements per atom. Specimens exposed to periodic temperature variations experienced a low temperature (360 °C) during the initial 10% of accrued dose in each of the eight cycles, and a higher temperature (520 °C) during the remaining 90% of accrued dose in each cycle. The microstructures of the irradiated stainless steel and V–4Cr–4Ti were qualitatively similar to companion specimens that were continuously maintained at 520 °C during the entire irradiation. The microstructural observations on pure copper irradiated at a constant temperature of 340 °C in this experiment are also summarized. The main radiation-induced microstructural features consisted of dislocation loops, stacking fault tetrahedra and voids in the stainless steel, Ti-rich precipitates in the V alloy, and voids (along with a low density of stacking fault tetrahedra) in copper.
    Original languageEnglish
    JournalJournal of Nuclear Materials
    Volume307-311
    Issue number1
    Pages (from-to)192-196
    ISSN0022-3115
    DOIs
    Publication statusPublished - Dec 2002
    Event10th International conference on fusion reactor materials - Baden-Baden, Germany
    Duration: 14 Oct 200119 Oct 2001
    Conference number: 10

    Conference

    Conference10th International conference on fusion reactor materials
    Number10
    CountryGermany
    CityBaden-Baden
    Period14/10/200119/10/2001

    Keywords

    • C1000
    • N0100
    • R0200
    • S0500
    • V0100

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