Fabrication of alloy 625/316H cladded component using hot isostatic pressing: Corrosion and mechanical property evaluation in molten chloride salts

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

Journal of Nuclear Materials Pub Date : 2025-08-26 DOI:10.1016/j.jnucmat.2025.156130

Minsung Hong , Seong Sik Hwang , Chaewon Kim , Seong-Jun Ha , Joon-Yeop Kwon , Gyeong-Hoi Koo

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引用次数: 0

Abstract

This study introduced the fabrication of hot isostatic pressing (HIP)-cladded Alloy 625 (A625) / type 316H stainless steel (SS316H) specimens, and evaluated the microstructural characteristics, mechanical properties, and corrosion resistance in comparison with their wrought counterpart. The HIP process effectively suppressed the formation of secondary phases and minimized internal defects, resulting in enhanced mechanical performance, particularly in terms of strength and ductility—key properties for high-temperature structural applications. In molten NaCl–KCl–MgCl₂ salt environments, HIP-treated samples exhibited improved corrosion resistance compared to the wrought materials. However, when both the cladding and substrate were simultaneously exposed to the molten salt, severe galvanic corrosion occurred in the SS316H substrate due to differences in electrochemical potential.

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热等静压制备625/316H合金包覆件：熔融氯化物盐中的腐蚀和力学性能评价

本研究介绍了热等静压（HIP）包覆625合金(A625) / 316H型不锈钢（SS316H）试样的制备方法，并对其显微组织特征、力学性能和耐腐蚀性进行了比较。HIP工艺有效地抑制了二次相的形成，最大限度地减少了内部缺陷，从而提高了机械性能，特别是在高温结构应用的强度和延展性方面。在熔融NaCl-KCl-MgCl 2盐环境中，与变形材料相比，经过hip处理的样品具有更好的耐腐蚀性。然而，当熔盐同时暴露于熔盐中时，由于电化学电位的差异，SS316H衬底发生了严重的电偶腐蚀。

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.