TY - JOUR
T1 - Effects of chemical composition and dose on microstructure evolution and hardening of neutron-irradiated reactor pressure vessel steels
AU - Takeuchi, T.
AU - Kuramoto, A.
AU - Kameda, J.
AU - Toyama, T.
AU - Nagai, Y.
AU - Hasegawa, M.
AU - Ohkubo, T.
AU - Yoshiie, T.
AU - Nishiyama, Y.
AU - Onizawa, K.
N1 - Funding Information:
This study was partially supported by Grant-in-Aid for Specially Promoted Research (17702009) and for Scientific Research (A) (21246142) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), and by the Budget for Nuclear Research of the Ministry of Education, Culture, Sports, Science and Technology, based on the screening and counseling by the Atomic Energy Commission, and was carried out under the Cooperative Research Program of International Research Center for Nuclear Materials Science, Institute for Materials Research (IMR), Tohoku University. The authors would like to thank M. Narui and M. Yamazaki at the Oarai Center for their support for hot laboratory work.
PY - 2010/7/31
Y1 - 2010/7/31
N2 - The correlation of microstructure evolution and hardening was studied in two kinds of A533B-1 steel with high and low levels of Cu irradiated in a range of dose from 0.32 to 9.9 × 1019 n cm-2 (E > 1 MeV) under a high flux of about 1.7 × 1013 n cm-2 s-1 using three-dimensional local electrode atom probe (3DAP), positron annihilation (PA) techniques, and Vickers microhardness. The early rapid hardening was found to be caused by mainly matrix defects such as mono-or di-vacancies (V1-V2) and/or dislocations indicated by the PA analysis. The 3DAP analysis showed that dense dispersion of dilute Cu rich clusters and lean distribution of Mn-Ni-Si rich clusters, which were identified to possess the same dislocation-pinning effect by applying a Russell and Brown model, were responsible for large and small hardening in high-and low-Cu steels irradiated above 0.59 × 1019 n cm2, respectively.
AB - The correlation of microstructure evolution and hardening was studied in two kinds of A533B-1 steel with high and low levels of Cu irradiated in a range of dose from 0.32 to 9.9 × 1019 n cm-2 (E > 1 MeV) under a high flux of about 1.7 × 1013 n cm-2 s-1 using three-dimensional local electrode atom probe (3DAP), positron annihilation (PA) techniques, and Vickers microhardness. The early rapid hardening was found to be caused by mainly matrix defects such as mono-or di-vacancies (V1-V2) and/or dislocations indicated by the PA analysis. The 3DAP analysis showed that dense dispersion of dilute Cu rich clusters and lean distribution of Mn-Ni-Si rich clusters, which were identified to possess the same dislocation-pinning effect by applying a Russell and Brown model, were responsible for large and small hardening in high-and low-Cu steels irradiated above 0.59 × 1019 n cm2, respectively.
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U2 - 10.1016/j.jnucmat.2010.04.008
DO - 10.1016/j.jnucmat.2010.04.008
M3 - Article
AN - SCOPUS:77954219499
SN - 0022-3115
VL - 402
SP - 93
EP - 101
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 2-3
ER -