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    Analysis of Stress-Induced Burgers Vector Anisotropy in Pressurized Tube Specimens of Irradiated Ferritic-Martensitic Steels: JFMS and JLF-1

    Published: Jan 2000

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    A procedure for determining the Burgers vector anisotropy in irradiated ferritic steels is described, allowing identification of all a ⟨ 100 ⟩ and all a/2 ⟨ 111 ⟩ dislocations in a region of interest. The necessary micrographs to apply the procedure have been taken of a pressurized tube specimen of JFMS, a duplex ferritic steel following irradiation in FFTF/MOTA at 407°C to 7.5 × 1022 n/cm2 (E > 0.1 MeV) or 37.5 dpa, and a pressurized tube of JLF-1 irradiated at 430°C under similar conditions to 14.3 × 1022 n/cm2 (E > 0.1 MeV) or 60 dpa. Analysis of micrographs indicates that large anisotropy in Burgers vector populations develop during irradiation creep.


    irradiation creep, dislocations, anisotropy, ferritic steel, microstructure

    Author Information:

    Gelles, DS
    Staff Engineer, Battelle Pacific Northwest National Laboratory, Richland, WA

    Kimura, A
    University of Kyoto, Kyoto,

    Shibayama, T
    Hokkaido University, Sapporo,

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP12413S

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