TY - GEN
T1 - Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe
AU - Toyama, T.
AU - Nagai, Y.
AU - Tang, Z.
AU - Hasegawa, M.
AU - Ohkubo, T.
AU - Hono, K.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2004
Y1 - 2004
N2 - Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.
AB - Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.
KW - Irradiation Effects
KW - Irradiation-Enhanced Precipitation
KW - Nuclear Reactor Pressure Vessel Steels
KW - Positron Annihilation
KW - Three-Dimensional Atom Probe
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U2 - 10.4028/www.scientific.net/msf.445-446.195
DO - 10.4028/www.scientific.net/msf.445-446.195
M3 - Conference contribution
AN - SCOPUS:3142734521
SN - 9780878499366
T3 - Materials Science Forum
SP - 195
EP - 197
BT - Positron Annihilation
A2 - Hyodo, Toshio
A2 - Saito, Haruo
A2 - Kobayashi, Yoshinori
A2 - Nagashima, Yasuyuki
PB - Trans Tech Publications Ltd
T2 - Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
Y2 - 7 September 2003 through 12 September 2003
ER -