改性 N50 钢在低温下的机械和物理特性

IF 1.8 3区 工程技术 Q3 PHYSICS, APPLIED
Yining Huang , Wentao Sun , Chuanjun Huang , Li Shi , Laifeng Li , Yuan Zhou
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引用次数: 0

摘要

与国际热核聚变实验堆(ITER)相比,中国聚变工程试验堆(CFETR)的设计参数更为先进,尤其要求电缆导管(CICC)的护套材料具有较高的屈服强度(4.2 K 时超过 1500 MPa)。改性 N50 奥氏体钢由于在液氦温度下具有优异的机械性能,已被确定为有希望成为护套材料的候选材料。然而,虽然一些研究重点关注改性 N50 钢在低温下的机械性能,但对导管护套应用至关重要的低温物理性能却知之甚少。本研究制备了改性 N50 钢,并对其在低温下的拉伸性能和物理性能进行了表征。我们测试了改性 N50 在 4.2 K、77 K 和室温 (RT) 下的拉伸性能。此外,我们还测量了改性 N50 在 4 K 至 300 K 的热导率、热膨胀率、比热容和磁化率。这些结果可为将改性 N50 钢应用于 CFETR 护套材料提供更全面的参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanical and physical properties of modified N50 steel at cryogenic temperatures

China Fusion Engineering Test Reactor (CFETR) has more advanced design parameters compared to the International Thermonuclear Experimental Reactor (ITER), particularly demanding a high yield strength (over 1500 MPa at 4.2 K) for jacket material in the cable-in-conduit conductor (CICC). Modified N50 austenitic steel, due to its excellent mechanical properties at liquid helium temperature, has been identified as a promising candidate material for the jacket material. However, while some research focuses on the mechanical properties of modified N50 steel at cryogenic temperatures, little is known about the cryogenic physical properties that are critical for conduit jacket applications. In this study, a modified N50 steel was prepared and characterized in terms of tensile properties and physical properties at cryogenic temperatures. We tested the tensile properties of the modified N50 at 4.2 K, 77 K, and room temperature (RT). Additionally, we measured the thermal conductivity, thermal expansion, specific heat capacity, and magnetization of the modified N50 from 4 K to 300 K. These results could provide a more comprehensive reference for applying the modified N50 steel in jacket materials for the CFETR.

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来源期刊
Cryogenics
Cryogenics 物理-热力学
CiteScore
3.80
自引率
9.50%
发文量
0
审稿时长
2.1 months
期刊介绍: Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are: - Applications of superconductivity: magnets, electronics, devices - Superconductors and their properties - Properties of materials: metals, alloys, composites, polymers, insulations - New applications of cryogenic technology to processes, devices, machinery - Refrigeration and liquefaction technology - Thermodynamics - Fluid properties and fluid mechanics - Heat transfer - Thermometry and measurement science - Cryogenics in medicine - Cryoelectronics
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