Prebending Effect for Mechanical and Superconducting Properties of Nb-Rod-Processed Cu-Nb Internal-Reinforced Nb3Sn Wires

H. Oguro, S. Awaji, K. Watanabe, M. Sugimoto, H. Tsubouchi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We are planning to develop three large superconducting magnets, using CuNb-reinforced Nb3Sn Rutherford cables with the prebending treatment. CuNb-reinforced Nb3Sn wires using a new Nb-rod-processed CuNb composite were developed for the Rutherford cables. In this study, the prebending effects for the mechanical and the superconducting properties of the Nb-rod-processed CuNb/Nb3 Sn wire were investigated. We found that the CuNb/Nb3Sn wire with 0.8% prebending treatment had largely enhanced critical current at 4.2 K. The reduction of the n-value was observed around 0.8% prebending strain. The mechanical properties of the prebent wires were enhanced. Young's modulus and 0.2% proof stress of the wire with prebending treatment at 4.2 K are 180 GPa and 270 MPa, respectively. The residual strain was released from 0.30% to 0.15% by 0.8% prebending treatment.

Original languageEnglish
Article number6674995
JournalIEEE Transactions on Applied Superconductivity
Volume24
Issue number3
DOIs
Publication statusPublished - 2014 Jun 1

Keywords

  • CuNb reinforcement
  • NbSn wire
  • mechanical property
  • prebending effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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