Effects of cold-treatment and strain-rate on mechanical properties of NbTi/Cu superconducting composite wires

doi:10.1186/s40064-015-0860-7

	Effects of cold-treatment and strain-rate on mechanical properties of NbTi/Cu superconducting composite wires
	Guan, Mingzhi 1,2; Wang, Xingzhe 1; Zhou, Youhe 1
刊名	SPRINGERPLUS
	2015-02-13
卷号	4 页码:7
关键词	NbTi/Cu composite wires Effect of cold-treatment Strain-rate Tensile response Mechanical property
ISSN号	2193-1801
DOI	10.1186/s40064-015-0860-7
英文摘要	During design and winding of superconducting magnets at room temperature, a pre-tension under different rate is always applied to improve the mechanical stability of the magnets. However, an inconsistency rises for superconductors usually being sensitive to strain and oversized pre-stress which results in degradation of the superconducting composites' critical performance at low temperature. The present study focused on the effects of the cold-treatment and strain-rate of tension deformation on mechanical properties of NbTi/Cu superconducting composite wires. The samples were immersed in a liquid nitrogen (LN2) cryostat for the adiabatic cold-treatment, respectively with 18-hour, 20-hour, 22-hour and 24-hour. A universal testing machine was utilized for tension tests of the NbTi/Cu superconducting composite wires at room temperature; a small-scale extensometer was used to measure strain of samples with variable strain-rate. The strength, elongation at fracture and yield strength of pre-cold-treatment NbTi/Cu composite wires were drawn. It was shown that, the mechanical properties of the superconducting wires are linearly dependent on the holding time of cold-treatment at lower tensile strain-rate, while they exhibit notable nonlinear features at higher strain-rate. The cold-treatment in advance and the strain-rate of pre-tension demonstrate remarkable influences on the mechanical property of the superconducting composite wires.
资助项目	National Natural Science Foundation of China[11302225] ; National Natural Science Foundation of China[11032006] ; Foundation for Innovative Research Groups of National Natural Science Foundation of China[11121202] ; National Key Project of Magneto-Constrained Fusion Energy Development Program[2013GB110002] ; China Postdoctoral Science Foundation[2014 M560820]
WOS关键词	BENDING STRAIN ; TOLERANCE ; IMPROVEMENT ; MAGNET ; TAPES
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SPRINGER INTERNATIONAL PUBLISHING AG
WOS记录号	WOS:000359157900005
资助机构	National Natural Science Foundation of China ; Foundation for Innovative Research Groups of National Natural Science Foundation of China ; National Key Project of Magneto-Constrained Fusion Energy Development Program ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/40387]
专题	中国科学院近代物理研究所
通讯作者	Wang, Xingzhe
作者单位	1.Lanzhou Univ, Coll Civil Engn & Mech, Minist Educ China, Key Lab Mech Environm & Disaster Western China, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Guan, Mingzhi,Wang, Xingzhe,Zhou, Youhe. Effects of cold-treatment and strain-rate on mechanical properties of NbTi/Cu superconducting composite wires[J]. SPRINGERPLUS,2015,4:7.
APA	Guan, Mingzhi,Wang, Xingzhe,&Zhou, Youhe.(2015).Effects of cold-treatment and strain-rate on mechanical properties of NbTi/Cu superconducting composite wires.SPRINGERPLUS,4,7.
MLA	Guan, Mingzhi,et al."Effects of cold-treatment and strain-rate on mechanical properties of NbTi/Cu superconducting composite wires".SPRINGERPLUS 4(2015):7.