Effects of repeated bending load at room temperature for composite Nb 3Sn wires

Satoshi Awaji, Kazuo Watanabe, Kazumune Katagiri

Research output: Contribution to journalConference articlepeer-review

15 Citations (Scopus)


In order to realize a react and wind (R&W) method for Nb3Sn wires, the influences of a bending load at room temperature are investigated. Usually, the superconducting wires undergo bending loads at room temperature repeatedly during winding and insulation processes. We define these bending loads as 'pre-bending' treatments. We applied the pre-bending strain of 0 and 0.5% to the highly strengthened CuNb/(Nb, Ti)3Sn wires, and measured the stress/strain properties and critical currents. The improvements of stress dependence of normalized critical current and the increase of the maximum critical current by the pre-bending treatments were found. The model based on the distribution of the local tensile strain as a bending strain describes the experimental results well without the increase of the maximum critical current. When the pre-bending strain was applied, the calculated results indicate that the mechanical properties are improved due to the local work hardening, and hence the stress dependence of Ic increases.

Original languageEnglish
Pages (from-to)1059-1063
Number of pages5
JournalSuperconductor Science and Technology
Issue number9
Publication statusPublished - 2003 Sep 1
EventMEMO 3: Second International Workshop on Mechano-Electromagetic Properties of Composite Superconductors - Kyoto, Japan
Duration: 2003 Mar 32003 Mar 5

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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