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Local plastic deformation effects on the critical current of high-Jc Nb3Sn strands under uniaxial strain

文献类型：期刊论文

作者Liu, Yunhao1,4; Sun, Yi1,4; Gao, Peng4; Nijhuis, Arend2; Devred, Arnaud3; Guo, Zichuan4; Zhu, Huajin5; Xu, Peng4; Shi, Yi4; Liu, Fang4
刊名SUPERCONDUCTOR SCIENCE & TECHNOLOGY
出版日期2024-11-01
卷号37
关键词high J(c) Nb3Sn strand local plastic deformation uniaxial strain critical current
ISSN号0953-2048
DOI10.1088/1361-6668/ad7647
通讯作者Dai, Chao(dc@ipp.ac.cn)
英文摘要In order to meet the target operating parameters of the toroidal field coils (TFCs) for the next-generation Chinese compact burning plasma tokamak, high critical current density (J(c)) Nb3Sn strand will be applied to the high-field winding-package of the TFC. To improve the transverse stiffness of the cable in withstanding the huge Lorentz force and avoiding conductor performance degradation, the short-twist-pitch and copper-wound-strand cable patterns were taken into consideration. In the processes of cabling and compaction of the conductor, the tight cable configurations lead to severe local plastic deformation (LPD) within the strands. The strands in the conductor are subjected to strain caused by thermal contraction and Lorentz force during conductor cooling down and operation. So far it is unknown, whether the LPD could impact the critical current (I-c) versus uniaxial applied strain behavior of high-J(c) Nb3Sn strand. Aiming to investigate the effect of LPD on the I-c of strands under uniaxial strain, three types of high J(c) Nb3Sn strand with different indentation depths were tested on a U-shaped bending spring. The axial strain ranges from -0.9% to +0.4% at 14 T and 4.2 K. The three types of strands showed more strain sensitivity and lower tensile irreversible strain limit with increasing LPD, while even irreversible degradation of the I-c could be observed in the compressive strain region. The sample preparation, test process, test results and analysis are reported.
资助项目Fusion Technology Program of China[2018-000052-73-01-001228] ; Comprehensive Research Facility for Fusion Technology Program of China[2108085ME181] ; Natural Science Foundation of Anhui Province of China
WOS研究方向Physics
语种英语
WOS记录号WOS:001326582100001
出版者IOP Publishing Ltd
资助机构Fusion Technology Program of China ; Comprehensive Research Facility for Fusion Technology Program of China ; Natural Science Foundation of Anhui Province of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135818]  
专题中国科学院合肥物质科学研究院
通讯作者Dai, Chao
作者单位1.Univ Sci & Technol China, Hefei 230026, Peoples R China
2.Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
3.CERN, TE Dept, 1 Esplanade Particules, CH-1211 Geneva, Switzerland
4.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
5.Anhui Univ Sci & Technol, Sch Mech Engn, Huainan 232001, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yunhao,Sun, Yi,Gao, Peng,et al. Local plastic deformation effects on the critical current of high-Jc Nb3Sn strands under uniaxial strain[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2024,37.
APA Liu, Yunhao.,Sun, Yi.,Gao, Peng.,Nijhuis, Arend.,Devred, Arnaud.,...&Qin, Jinggang.(2024).Local plastic deformation effects on the critical current of high-Jc Nb3Sn strands under uniaxial strain.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,37.
MLA Liu, Yunhao,et al."Local plastic deformation effects on the critical current of high-Jc Nb3Sn strands under uniaxial strain".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 37(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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