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WB-STEM observation of dislocation loop behavior in reactor pressure vessel steel during post-irradiation annealingDu, Y.*; Yoshida, Kenta*; Shimada, Yusuke*; Toyama, Takeshi*; Inoue, Koji*; Arakawa, Kazuto*; Suzudo, Tomoaki; Milan, K. J.*; Gerard, R.*; Onuki, Somei*; et al.
Materialia, 12, p.100778_1 - 100778_10, 2020/08
In order to ensure the integrity of the reactor pressure vessel in the long term, it is necessary to understand the effects of irradiation on the materials. In this study, irradiation-induced dislocation loops were observed in neutron-irradiated reactor pressure vessel specimens during annealing using our newly developed WB-STEM. It was confirmed that the proportion of 
loops increased with increasing annealing temperature. We also succeeded in observing the phenomenon that two 
loops collide into a loop. Moreover, a phenomenon in which dislocation loops decorate dislocations was also observed, and the mechanism was successfully explained by molecular dynamics simulation.
Wakai, Eiichi; Hashimoto, Naoyuki*; Robertson, J. P.*; Sawai, Tomotsugu; Hishinuma, Akimichi
Journal of Nuclear Materials, 307-311(Part.1), p.352 - 356, 2002/12
Times Cited Count：11 Percentile：58.11(Materials Science, Multidisciplinary)no abstracts in English
ion irradiationWakai, Eiichi; Ezawa, Tadashi*; Imamura, Junko*; Takenaka, Tsuyoshi*; Tanabe, Tetsuo*; Oshima, Ryuichiro*
Journal of Nuclear Materials, 307-311(Part.1), p.367 - 373, 2002/12
Times Cited Count：29 Percentile：84.88(Materials Science, Multidisciplinary)no abstracts in English
ion irradiationWakai, Eiichi; Hishinuma, Akimichi; Abe, Hiroaki; Takaki, Seiichi*; Abiko, Kenji*
Materials Transactions, JIM, 41(9), p.1176 - 1179, 2000/09
no abstracts in English
*; *; *; *; Hasegawa, Makoto; Hirano, Koichiro
JNC TY9400 2000-007, 50 Pages, 2000/03
JNC-TY9400-2000-007.pdf:1.29MB
no abstracts in English
Fe isotopeWakai, Eiichi; Hashimoto, N.*; Shiba, Kiyoyuki; Miwa, Yukio; J.P.Robertson*; R.L.Klueh*
Fusion Materials, 313(25), p.151 - 160, 1999/04
no abstracts in English
Hamada, Shozo; Y.C.Zhang*; Miwa, Yukio; Yamaki, Daiju
Radiation Physics and Chemistry, 50(6), p.555 - 559, 1997/00
Times Cited Count：9 Percentile：59.76(Chemistry, Physical)no abstracts in English
Wakai, Eiichi; Hishinuma, Akimichi; Kato, Yasushi*; *; *
Nihon Kinzoku Gakkai Koen Gaiyo, 1994 Shuki (Dai-115-Kai) Taikai, 0, p.488 - 494, 1994/00
no abstracts in English
*; Furuno, Shigemi; Hojo, Kiichi; Ono, K.*; *; *; Kino, Takao*
Journal of Nuclear Materials, 191-194, p.1214 - 1218, 1992/00
Times Cited Count：4 Percentile：41.92(Materials Science, Multidisciplinary)no abstracts in English
E.A.Kenik*; Hojo, Kiichi
Journal of Nuclear Materials, 191-194, p.1331 - 1335, 1992/00
Times Cited Count：34 Percentile：92.8(Materials Science, Multidisciplinary)no abstracts in English
Ono, K.*; *; Furuno, Shigemi; Kino, Takao*; *; Hojo, Kiichi; *; *; *; *
Journal of Nuclear Materials, 191-194, p.1209 - 1213, 1992/00
Times Cited Count：1 Percentile：0.01(Materials Science, Multidisciplinary)no abstracts in English
YCu
O
superconductor by electron irradiation in a transmission electron microscopeShiraishi, Kensuke;
Materials Research Society Symposium Proceedings, Vol.169, p.835 - 838, 1990/00
no abstracts in English
; ; ; Izui, Kazuhiko; *
Journal of Nuclear Materials, 155-157, p.298 - 302, 1988/00
Times Cited Count：31 Percentile：91.98(Materials Science, Multidisciplinary)no abstracts in English
; Katano, Y.; Shiraishi, K.
Journal of Nuclear Science and Technology, 21(9), p.671 - 677, 1984/00
Times Cited Count：14 Percentile：79.2(Nuclear Science & Technology)no abstracts in English
Hamada, S.; ; Shiraishi, K.
Nihon Genshiryoku Gakkai-Shi, 26(8), p.695 - 697, 1984/00
Times Cited Count：0 Percentile：0.3(Nuclear Science & Technology)no abstracts in English
; Shiraishi, K.
Nihon Genshiryoku Gakkai-Shi, 25(2), p.123 - 125, 1983/00
Times Cited Count：0 Percentile：0.29(Nuclear Science & Technology)no abstracts in English
; Katano, Y.; ; Shiraishi, K.
Journal of Nuclear Science and Technology, 13(11), p.656 - 662, 1976/11
Times Cited Count：8no abstracts in English
CShiraishi, K.; ; Katano, Y.
JAERI-M 6214, 20 Pages, 1975/08
no abstracts in English
CShiraishi, K.; ; Katano, Y.
Journal of Nuclear Materials, 57(3), p.361 - 364, 1975/03
Times Cited Count：13no abstracts in English
Shiraishi, K.; ; Katano, Y.
Radiat.Eff., 21(3), p.161 - 164, 1974/03
no abstracts in English
Suzudo, Tomoaki
no journal, ,
Hardening due to dislocation loop formation is considered to be one of the main causes of irradiation embrittlement of steels in nuclear applications. Recently, WB-STEM is used to observe small dislocation loops in order to understand the phenomenon. However, the time scale of the phenomenon in question is very small, and even if the static state can be grasped by experimental observation, the dynamic nature cannot be understood. Therefore, it is important to interpolate the experimental observations by molecular dynamics (MD) simulations. In this presentation, I will discuss the current status and future prospects of dislocation loop modeling.
