The axial tensile stress-strain characterization of Ag-Sheathed Bi2212 round wire

Chao Dai, Bo Liu, Jinggang Qin, Fang Liu, Yu Wu, Chao Zhou

Research output: Contribution to journalConference articleAcademicpeer-review

20 Citations (Scopus)

Abstract

The stress distribution generated by the differences in the thermal expansion and the electromagnetic load is the driving factor for the transport properties of Bi2212 superconducting round wire (RW). The effort on studying the impact of strain on the transport properties is increasing, in terms of the axial and transverse stiffness of the RW. Consequently, the experimental stress-strain data are required at the RW level for accurate modeling, analysis and eventually for optimizing cable design and manufacture. In this paper, the axial tensile measurements on Bi2212 RWs and component materials (Ag and Ag/Mg alloy) have been performed at room temperature, 77 K and 4.2 K, respectively. Comparing with LTS strand (e.g., Nb3Sn and NbTi) , the stiffness of Bi2212 RW is less, which has become the primary problem in its application. A simple model was used to simulate the stress-strain characteristic, and compared to experimental results.

Original languageEnglish
Article number6963304
JournalIEEE transactions on applied superconductivity
Volume25
Issue number3
DOIs
Publication statusPublished - 1 Jun 2015
Event2014 Applied Superconductivity Conference, ASC 2014 - Charlotte Convention Center, Charlotte, United States
Duration: 10 Aug 201415 Aug 2014
http://ascinc.org/2014/

Keywords

  • Ag
  • Ag/Mg alloy
  • Axial tensile performance
  • Bi2212
  • Model

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