晶界工程对 GH3535 合金在 LiCl-KCl 熔盐中的腐蚀行为和机械性能的影响

IF 2.8 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Nuclear Materials Pub Date : 2024-11-09 DOI:10.1016/j.jnucmat.2024.155513

Chaochao Wang , Jumei Zhang , Zhongdi Yu , Jinping Wu

{"title":"晶界工程对 GH3535 合金在 LiCl-KCl 熔盐中的腐蚀行为和机械性能的影响","authors":"Chaochao Wang , Jumei Zhang , Zhongdi Yu , Jinping Wu","doi":"10.1016/j.jnucmat.2024.155513","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigated the effect of grain boundary engineering (GBE) on the corrosion behavior and high-temperature mechanical properties of GH3535 alloy in 45LiCl-55KCl wt.% molten salt at 550 °C. After corrosion for 300 h, a triple-layered product was formed on the solid solution specimen (Non-GBE), consisting of discontinuous NiCr<sub>2</sub>O<sub>4</sub> outer-layer, Ni<sub>3</sub>Fe middle-layer, and NiCr<sub>2</sub>O<sub>4</sub> inner-layer. For the GBE specimen, quite milder corrosion occurred on it that its surface still kept original polishing scratches. The real mass loss of the Non-GBE alloy (6.85 mg/cm<sup>2</sup>) is one order of magnitude higher than that of GBE (0.65 mg/cm<sup>2</sup>). The beneficial effect of GBE on improving alloy's corrosion resistance is owing to: surface carbide dissolution, discontinuous random high angle grain boundary and low dislocation density. High proportion of Σ3<sup>n</sup> grain boundaries and less carbide precipitation ensure stable high-temperature deformation performance of GBE sample in molten salt.</div></div>","PeriodicalId":373,"journal":{"name":"Journal of Nuclear Materials","volume":"604 ","pages":"Article 155513"},"PeriodicalIF":2.8000,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of grain boundary engineering on corrosion behavior and mechanical properties of GH3535 alloy in LiCl-KCl molten salt\",\"authors\":\"Chaochao Wang , Jumei Zhang , Zhongdi Yu , Jinping Wu\",\"doi\":\"10.1016/j.jnucmat.2024.155513\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigated the effect of grain boundary engineering (GBE) on the corrosion behavior and high-temperature mechanical properties of GH3535 alloy in 45LiCl-55KCl wt.% molten salt at 550 °C. After corrosion for 300 h, a triple-layered product was formed on the solid solution specimen (Non-GBE), consisting of discontinuous NiCr<sub>2</sub>O<sub>4</sub> outer-layer, Ni<sub>3</sub>Fe middle-layer, and NiCr<sub>2</sub>O<sub>4</sub> inner-layer. For the GBE specimen, quite milder corrosion occurred on it that its surface still kept original polishing scratches. The real mass loss of the Non-GBE alloy (6.85 mg/cm<sup>2</sup>) is one order of magnitude higher than that of GBE (0.65 mg/cm<sup>2</sup>). The beneficial effect of GBE on improving alloy's corrosion resistance is owing to: surface carbide dissolution, discontinuous random high angle grain boundary and low dislocation density. High proportion of Σ3<sup>n</sup> grain boundaries and less carbide precipitation ensure stable high-temperature deformation performance of GBE sample in molten salt.</div></div>\",\"PeriodicalId\":373,\"journal\":{\"name\":\"Journal of Nuclear Materials\",\"volume\":\"604 \",\"pages\":\"Article 155513\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-11-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Nuclear Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022311524006147\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022311524006147","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

本研究探讨了晶界工程（GBE）对 GH3535 合金在 550 °C 的 45LiCl-55KCl wt.% 熔盐中的腐蚀行为和高温力学性能的影响。腐蚀 300 小时后，固溶试样（非 GBE）上形成了由不连续的 NiCr2O4 外层、Ni3Fe 中层和 NiCr2O4 内层组成的三层产物。GBE 试样的腐蚀程度较轻，其表面仍保持原有的抛光划痕。非 GBE 合金的实际质量损失（6.85 毫克/平方厘米）比 GBE 合金的实际质量损失（0.65 毫克/平方厘米）高出一个数量级。GBE 对提高合金耐腐蚀性的有利影响在于：表面碳化物溶解、不连续随机高角度晶界和低位错密度。高比例的 Σ3n 晶界和较少的碳化物析出确保了 GBE 试样在熔盐中稳定的高温变形性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

Effect of grain boundary engineering on corrosion behavior and mechanical properties of GH3535 alloy in LiCl-KCl molten salt

This study investigated the effect of grain boundary engineering (GBE) on the corrosion behavior and high-temperature mechanical properties of GH3535 alloy in 45LiCl-55KCl wt.% molten salt at 550 °C. After corrosion for 300 h, a triple-layered product was formed on the solid solution specimen (Non-GBE), consisting of discontinuous NiCr₂O₄ outer-layer, Ni₃Fe middle-layer, and NiCr₂O₄ inner-layer. For the GBE specimen, quite milder corrosion occurred on it that its surface still kept original polishing scratches. The real mass loss of the Non-GBE alloy (6.85 mg/cm²) is one order of magnitude higher than that of GBE (0.65 mg/cm²). The beneficial effect of GBE on improving alloy's corrosion resistance is owing to: surface carbide dissolution, discontinuous random high angle grain boundary and low dislocation density. High proportion of Σ3ⁿ grain boundaries and less carbide precipitation ensure stable high-temperature deformation performance of GBE sample in molten salt.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

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.