NDLI: Cryogenic Temperature Dependence of Tensile Response of NbTi/Cu Superconducting Composite Wires

Content Provider	IEEE Xplore Digital Library
Author	Mingzhi Guan Xingzhe Wang Youhe Zhou
Copyright Year	2002
Abstract	The effects of variable cryogenic temperature on the tensile response are reported for the commercial superconducting composite wires consisting of niobium-titanium filaments in a copper matrix (NbTi/Cu). A variable temperature cryostat system is constructed to provide the successive cooling environment from room temperature (RT) to the liquid nitrogen temperature (LNT), and a cryogenic-type extensometer is used to measure tensile strains of the superconducting wires. With the variable cryogenic temperature, the corresponding stress and strain relations are recorded during the wire being stretched. The mechanical behavior of the NbTi/Cu composite wire and pure NbTi filaments, including the tensile strength and elongation at fracture, yield strength, and Young's modulus, are further captured. It is shown that ultimate tensile strengths and Young's moduli of the NbTi/Cu composite wire and pure NbTi filaments are almost linearly dependent on the temperature, whereas the elongation at fracture and the yield strength exhibit notable nonlinear features with the superconducting wires' cooling. In addition, based on the mechanical properties measured from RT to LNT, the properties at the lower temperature of 4.2 K are extrapolated for the NbTi/Cu composite wire and NbTi filaments, which are compared with the experimental data in the literature.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	8401106
Ending Page	8401106
Page Count	1
File Size	245234
File Format	PDF
ISSN	10518223
Volume Number	22
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wires Cryogenics Superconducting filaments and wires Mechanical factors Temperature dependence variable cryogenic temperature NbTi filaments NbTi/Cu composite tensile response
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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