TY - JOUR
T1 - Irradiation-induced precipitates in a neutron irradiated 304 stainless steel studied by three-dimensional atom probe
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 would like to thank M. Yamazaki and M. Narui for their support for hot laboratory work. This work was partially supported by Grant-in-Aids for Scientific Research (Nos. 21246142 and 22686058) of the Ministry of Education, Culture, Sports, Science and Technology.
PY - 2011/11
Y1 - 2011/11
N2 - Irradiation-induced precipitates in a 304 stainless steel, neutron-irradiated to a dose of 24 dpa at 300 °C in the fuel wrapper plates of a commercial pressurized water reactor, were investigated by laser-assisted three-dimensional atom probe. A high number density of 4 × 1023 m-3 of Ni-Si rich precipitates was observed, which is one order of magnitude higher than that of Frank loops. The average diameter was ∼10 nm and the average chemical composition was 40% Ni, 14% Si, 11% Cr and 32% Fe in atomic percent. Over a range of Si concentrations, the ratio of Ni to Si was ∼3, close to that of γ′ precipitate (Ni3Si). In some precipitates, Mn enrichment inside the precipitate and P segregation at the interface were observed. Post-irradiation annealing was performed to discuss the contribution of the precipitates to irradiation-hardening.
AB - Irradiation-induced precipitates in a 304 stainless steel, neutron-irradiated to a dose of 24 dpa at 300 °C in the fuel wrapper plates of a commercial pressurized water reactor, were investigated by laser-assisted three-dimensional atom probe. A high number density of 4 × 1023 m-3 of Ni-Si rich precipitates was observed, which is one order of magnitude higher than that of Frank loops. The average diameter was ∼10 nm and the average chemical composition was 40% Ni, 14% Si, 11% Cr and 32% Fe in atomic percent. Over a range of Si concentrations, the ratio of Ni to Si was ∼3, close to that of γ′ precipitate (Ni3Si). In some precipitates, Mn enrichment inside the precipitate and P segregation at the interface were observed. Post-irradiation annealing was performed to discuss the contribution of the precipitates to irradiation-hardening.
UR - http://www.scopus.com/inward/record.url?scp=80053557256&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2011.07.027
DO - 10.1016/j.jnucmat.2011.07.027
M3 - 学術論文
AN - SCOPUS:80053557256
SN - 0022-3115
VL - 418
SP - 62
EP - 68
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -