2022 Annual Meeting

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

[2J09-14] Irradiation Effect

Thu. Mar 17, 2022 4:00 PM - 5:45 PM Room J

Chair: Hirokazu Ohta (CRIEPI)

4:30 PM - 4:45 PM

[2J11] Ion-irradiation effects on hardness and microstructures in RPV model alloys with higher Mn-Ni-Si concentrations

*Xinrun Chen1, Ruheine Naidu Chandren1, Ba Vu Chinh Nguyen1, Kenta Murakami2 (1. Nagaoka University of Technology, 2. University of Tokyo)

Keywords:High Mn-Ni-Si RPV model alloys, Ion irradiation, Hardening

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. Average irradiation induced hardening of 1.6 and 2.8 GPa were observed using nanoindentation in different dose, respectively. In addition, Transmission Electron Microscope (TEM) and Atom Probe Tomography (APT) analysis are considered to be conducted to figure out the details of precipitation.