[3L01-05] Fusion Reactor Materials 1

[3L03] Temperature dependence on amorphization of M₂₃C₆ under ion irradiation

*Sho Kano¹, Huilong Yang¹, John Patrick McGrady¹, Dai Hamaguchi², Masami Ando², Hiroyasu Tanigawa², Hiroaki Abe¹ (1. Univ. of Tokyo, 2. QST)

Keywords:Reduced activation ferritic steel, Radiation damage, Ion irradiation, Amorphousization, M23C6

Ion irradiations at around 573 K were performed on F82H steel and its model steel (Fe-Cr-C system), and the instability behavior of M₂₃C₆ at each irradiation temperature was evaluated by microstructure observations after irradiation. Amorphization of M₂₃C₆ was confirmed in the lower dose specimen (~1 dpa), and the maximum amorphization temperature was estimated at 573 K under the conditions of this study. Although, the amorphous and crystalline M₂₃C₆ co-existed in all of the irradiation temperature conditions in this study.