Staff Engineer, Battelle Pacific Northwest National Laboratory, Richland, WA
University of Kyoto, Kyoto,
Hokkaido University, Sapporo,
Pages: 13 Published: Jan 2000
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
Paper ID: STP12413S