Grain boundary segregation in neutron-irradiated 304 stainless steel studied by atom probe tomography

T. Toyama, Y. Nozawa, W. Van Renterghem, Y. Matsukawa, M. Hatakeyama, Y. Nagai, A. Al Mazouzi, S. Van Dyck

    Research outputpeer-review

    Abstract

    Radiation-induced segregation (RIS) of solute atoms at a grain boundary (GB) in 304 stainless steel (SS), neutron-irradiated to a dose of 24 dpa at 300°C in the fuel wrapper plates of a commercial pressurized water reactor, was investigated using laser-assisted atom probe tomography (APT). Ni, Si, and P enrichment and Cr and Fe depletion at the GB were evident. The full-width at half-maximum of the RIS region was ∼3 nm for the concentration profile peaks of Ni and Si. The atomic percentages of Ni, Si, and Cr at the GB were ∼19%, ∼7%, and ∼14%, respectively, in agreement with previously-reported values for neutron-irradiated SS. A high number density of intra-granular Ni-Si rich precipitates formed in the matrix. A precipitate-denuded zone with a width of ∼10 nm appeared on both sides of the GB.

    Original languageEnglish
    Pages (from-to)71-75
    Number of pages5
    JournalJournal of Nuclear Materials
    Volume425
    Issue number1-3
    DOIs
    StatePublished - Jun 2012

    Funding

    The authors thank M. Yamazaki and M. Narui for their support with hot laboratory work. This work was partially supported by Grants-in-Aid for Scientific Research (Nos. 21246142, 22686058, and 23760822) from the Ministry of Education, Culture, Sports, Science, and Technology.

    FundersFunder number
    Japan Society for the Promotion of Science24246155, 22686058, 23760822, 21246142
    Ministry of Education, Culture, Sports, Science and Technology

      ASJC Scopus subject areas

      • Nuclear and High Energy Physics
      • General Materials Science
      • Nuclear Energy and Engineering

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