Evidence of radiation induced segregation clustering in binary ferritic model alloys

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

Journal of Nuclear Materials Pub Date : 2025-10-07 DOI:10.1016/j.jnucmat.2025.156211

M. Vrellou , A. Nomoto , P. Pareige , B. Radiguet

引用次数: 0

Abstract

This study investigates the microstructural changes and hardening mechanisms in irradiated binary Fe-Mn and Fe-Ni model alloys using atom probe tomography (APT). Mn and Ni are key alloying elements in reactor pressure vessel (RPV) steels, enhancing hardenability and mechanical properties while increasing irradiation sensitivity. Neutron irradiation introduces point defects that lead to solute clustering, impacting the mechanical properties of the materials. APT analysis reveals and quantifies the formation of Mn and Ni clusters, which act as barriers to dislocation motion and contribute to irradiation hardening. This research isolates the individual behavior of Mn and Ni by studying undersaturated binary model alloys, providing detailed insights into the mechanisms of radiation-induced segregation and nanoscale solute clustering and these effect on hardening.

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二元铁素体模型合金中辐射诱导偏析聚类的证据

利用原子探针层析成像技术（APT）研究了Fe-Mn和Fe-Ni二元模型合金辐照后的显微组织变化及其硬化机制。Mn和Ni是反应堆压力容器（RPV）钢的关键合金元素，在提高辐照敏感性的同时提高淬透性和力学性能。中子辐照会引入点缺陷，导致溶质聚集，影响材料的力学性能。APT分析揭示并量化了Mn和Ni簇的形成，它们是位错运动的障碍，有助于辐照硬化。本研究通过研究欠饱和二元模型合金，分离了Mn和Ni的个体行为，为辐射诱导偏析和纳米级溶质聚类的机制及其对硬化的影响提供了详细的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.