The Influence of Strain Rate on the Tensile Properties of a Nb-Ti/Cu Superconducting Composite Wire Under Variable Cryogenic Temperature

doi:10.1109/TASC.2015.2510608

	The Influence of Strain Rate on the Tensile Properties of a Nb-Ti/Cu Superconducting Composite Wire Under Variable Cryogenic Temperature
	Guan, MZ; Wang, XZ; Zhou, YH; Wang, XZ (reprint author), Lanzhou Univ, Key Lab Mech Environm & Disaster Western China, Minist Educ China, Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China.
刊名	IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
	2016-03
卷号	26 期号:2
关键词	Mechanical characteristic strain rate superconducting composite wire tensile response variable cryogenic temperature
ISSN号	1051-8223
DOI	10.1109/TASC.2015.2510608
文献子类	Article
英文摘要	The tensile properties of superconducting wires usually play an essential role in practical applications. The effect of strain rate on the tension responses of commercial superconducting composite wires consisting of niobium-47wt.% Ti filaments in a copper matrix (Nb-Ti/Cu) with a Cu: superconductor ratio of similar to 4.3, under variable cryogenic temperature, is experimentally investigated in this paper. A variable temperature cryostat system is employed, which provides the cooling environment from room temperature to liquid nitrogen temperature, and a compact-scale cryogenic-type extensometer is utilized to measure the tensile strains on the superconducting wires. Under a range of cryogenic temperatures, the corresponding stress and strains are recorded during the elongation of the wire with a broad range of strain rates (10(-1) to 10(-4) s(-1)). The cryogenic mechanical behaviors of the Nb-Ti/Cu composite wires, including the tensile strength and elongation at fracture, as well as the yield stress, are captured experimentally. It is shown that the ultimate tensile strength and the yield strength of the Nb-Ti/Cu superconducting wires increased linearly with cryogenic temperature for the lower strain rates, while notable nonlinear features appear at a higher strain rate. The elongations always increased nonlinearly with decreasing temperature for each tested strain rate, but the elongations decreased with higher strain rate. The Young's modulus approximately increases linearly with decreasing temperature for each strain rate. Additionally, the effect of strain hardening rate derived from the stress and strain relations for the superconducting wires at different cryogenic temperatures and strain rates is discussed.
学科主题	Engineering ; Physics
出版地	PISCATAWAY
资助项目	国家自然科学基金项目 ; 国家磁约束核聚变能发展研究专项 ; 中国博士后科学基金 ; 国家留学基金委项目
项目编号	National Natural Science Foundation of China (NSFC) [11302225] ; Foundation for Innovative Research Groups of NSFC [11421062] ; National Key Project of Magneto-Constrained Fusion Energy Development Program [2013GB110002B] ; China Postdoctoral Science Foundation [2014M560820] ; National Scholarship Foundation of China [201404910172]
语种	英语
WOS记录号	WOS:000369077900001
资助机构	NSFC ; MOST ; CPSF ; CSC
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182502]
专题	土木工程与力学学院_期刊论文
通讯作者	Wang, XZ (reprint author), Lanzhou Univ, Key Lab Mech Environm & Disaster Western China, Minist Educ China, Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Guan, MZ,Wang, XZ,Zhou, YH,et al. The Influence of Strain Rate on the Tensile Properties of a Nb-Ti/Cu Superconducting Composite Wire Under Variable Cryogenic Temperature[J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,2016,26(2).
APA	Guan, MZ,Wang, XZ,Zhou, YH,&Wang, XZ .(2016).The Influence of Strain Rate on the Tensile Properties of a Nb-Ti/Cu Superconducting Composite Wire Under Variable Cryogenic Temperature.IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY,26(2).
MLA	Guan, MZ,et al."The Influence of Strain Rate on the Tensile Properties of a Nb-Ti/Cu Superconducting Composite Wire Under Variable Cryogenic Temperature".IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 26.2(2016).