TY - JOUR
T1 - Grain boundary segregation in neutron-irradiated 304 stainless steel studied by atom probe tomography
AU - Toyama, T.
AU - Nozawa, Y.
AU - Van Renterghem, W.
AU - Matsukawa, Y.
AU - Hatakeyama, M.
AU - Nagai, Y.
AU - Al Mazouzi, A.
AU - Van Dyck, S.
N1 - Funding Information:
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.
PY - 2012/6
Y1 - 2012/6
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jnucmat.2011.11.072
DO - 10.1016/j.jnucmat.2011.11.072
M3 - Article
AN - SCOPUS:84860483402
SN - 0022-3115
VL - 425
SP - 71
EP - 75
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -