Abstract: In this paper, the irradiation resistance mechanisms of nickel-based alloys under high-temperature reactor conditions were comprehensively investigated, particularly focused on addressing irradiation-induced swelling, embrittlement, and hardening. Through systematic analysis of alloy composition, manufacturing processes, and irradiation parameters, a series of modification strategies have been developed to enhance irradiation tolerance. It includes precise compositional tuning to suppress helium generation, optimized processing techniques to impede helium bubble coalescence and coarsening, and strategic grain boundary engineering to mitigate solute segregation and defect accumulation. Innovatively, the research explores incorporating secondary-phase particles(carbides/oxides) to effectively trap and pin helium bubbles, thereby reducing helium embrittlement susceptibility. High-temperature annealing treatments further enhance radiation resistance by relieving internal stresses and reducing crystalline defects. These findings establish critical theoretical foundations and provide advanced technical pathways for developing next-generation nuclear-grade nickel-based alloys suitable for high-temperature reactors. The proposed methodologies offer substantial engineering significance for ensuring safe, stable, and extended operation of nuclear reactor systems.
王优, 林基伟, 王晨, 卢俊强. 高温反应堆用镍基合金辐照性能的研究进展及改性方向研究[J]. 材料导报, 2026, 40(6): 24110035-8.
WANG You, LIN Jiwei, WANG Chen, LU Junqiang. Research and Modification Direction of Irradiation Resistance of Nickel-based Alloy in High Temperature Nuclear Reactor. Materials Reports, 2026, 40(6): 24110035-8.
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