2022 Fall Meeting

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V. Nuclear Fuel Cycle and Nuclear Materials » 502-1 Nuclear Materials, Degradation, Radiation Effects, and Related Technology

[2E01-06] Irradiation Effect

Thu. Sep 8, 2022 9:45 AM - 11:25 AM Room E (E1 Bildg.2F No.24)

Chair:Naoyuki Hashimoto(Hokkaido Univ.)

10:00 AM - 10:15 AM

[2E02] Ion-irradiation Effects on Microstructures in RPV Model Alloys with Higher Mn-Ni-Si Concentrations

*XINRUN CHEN1, NGUYEN Ba Vu Chinh1, Kenta Murakami2 (1. Nagaoka University of Technology, 2. The University of Tokyo)

Keywords:High Mn-Ni-Si RPV model alloys, Ion Irradiation, MNS precipitates

To investigate the details of Mn-Ni-Si clusters evolution in reactor pressure vessel (RPV) steels, Fe-4.6wt.%Ni-1.7wt.%Mn-0.7wt.%Si alloys were irradiated by 2.8 MeV Fe ions at 573K up to 0.3 and 0.9 dpa at the dose rate of 10-4 dpa/s. There are no large secondary phases precipitates (below 10nm) observed by instant TEM. Heterogeneity of MNS distribution, that looks like a decomposition and/or columned precipitates were observed in the dosage of 0.9dpa by atom probe tomography. More information of other specimens is expected in the future.