质子辐照下RPV钢中NiMnSi团簇的演化：Cu的影响

IF 3.2 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nuclear Materials Pub Date : 2025-09-22 DOI:10.1016/j.jnucmat.2025.156174

Wenqiang Wang , Bin Li , Miao Fu , Wenqing Jia , Qiwei Quan , Xiangbing Liu , Wenqing Liu

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引用次数: 0

摘要

铜是核反应堆压力容器（RPV）钢中的一种杂质元素，即使是微量的铜也会引起辐照硬化和脆化。本研究对中国RPV钢（0.027 wt.% Cu）和高Cu分数（RCA, 0.62 wt.% Cu）的模拟钢进行了一系列影响的质子辐照实验。采用纳米压痕法测定辐照前后样品的硬度，并采用原子探针断层扫描（APT）技术分析两种辐照钢中NiMnSi团簇的演变。研究结果表明，Cu元素可以促进NiMnSi团簇的成核，使辐照后的RCA钢中NiMnSi团簇的体积分数高于RPV钢，从而使RCA钢的辐照硬化效应更为显著。同时，Cu似乎抑制了NiMnSi簇的生长。随着辐照损伤的积累，RPV钢中NiMnSi团簇的组成接近于G相（Ni16Mn6Si7），而在RCA钢中，NiMnSi团簇的组成逐渐与Cu团簇分离，并且NiMnSi团簇的组成更接近于τ2相（Ni3Mn2Si）。

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The evolution of NiMnSi clusters in RPV steels under proton irradiation: The effect of Cu

Cu is an impurity element in nuclear reactor pressure vessel (RPV) steel, and even trace amounts can induce irradiation hardening and embrittlement. Proton irradiation experiments with a range of fluences were carried out on Chinese RPV steel (0.027 wt.% Cu) and the simulated steel with a high Cu fraction (referred to as RCA, 0.62 wt.% Cu) in this study. The samples' hardness was assessed by means of nano-indentation both before irradiation and after irradiation, and the evolution of NiMnSi clusters in the two types of irradiated steels was analyzed via atom probe tomography (APT) technology. Research results indicate that Cu element can promote the nucleation of NiMnSi clusters, which leads to a greater volume fraction of NiMnSi clusters in irradiated RCA steels compared to RPV steels, resulting in a more significant irradiation hardening effect in RCA steels. At the same time, Cu appears to suppress the growth of NiMnSi clusters. As irradiation damage accumulates, the composition of NiMnSi clusters in RPV steels approached that of the G phase (Ni₁₆Mn₆Si₇), while in RCA steels, a gradual separation trend of NiMnSi clusters and Cu clusters was observed, and the composition of NiMnSi clusters changed to be closer to the τ₂ phase (Ni₃Mn₂Si).

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.