[3C01-05] Irradiation Effects

[3C01] Effect of irradiation temperature on Mn-Ni-Si clusters in RPV model alloys

*Xinrun Chen¹, Tatsuya Suzuki¹, Ba Vu Chinh NGUYEN⁴, Takeshi Toyama³, Koji Inoue³, Sho Kano², Kenta Murakami² (1. Nagaoka University of Technology, 2. The University of Tokyo, 3. Tohoku University, 4. The University of Danang)

Keywords:reactor pressure vessels , Mn-Ni-Si precipitates, irradiation hardening, atom probe tomography

To investigate the details of evolution process of Mn-Ni-Si precipitates in reactor pressure vessel (RPV) steels, a RPV model alloy, which has higher Mn-Ni-Si concentrations, were irradiated by 2.8 MeV Fe²⁺ ion irradiation at 573~698 K up to 0.9 dpa. Irradiation induced hardening and precipitate properties varied greatly with temperature.