Residual strain measurement using neutron diffraction for practical Nb 3Sn wires under a tensile load

Hidetoshi Oguro, Satoshi Awaji, Gen Nishijima, Kohki Takahashi, Kazuo Watanabe, Shutaro MacHiya, Hiroshi Suzuki, Yoshinori Tsuchiya, Kozo Osamura

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Residual strains for practical Nb3Sn superconducting wires were measured directly using neutron diffraction. Seven wires, stacked with epoxy resin, were measured under a tensile load at room temperature. As a result, the three-dimensional strain was obtained up to 0.5% axial tensile strain. We found that the neutron diffraction result is consistent with the strain measured using strain gauges and extensometers at the same time, although the strains increased due to the long measurement time. The ratio between the axial and lateral strains is about 0.33, although the Cu-Sn, Cu and CuNb were plastic in this region. The ratio is an important value for evaluating three-dimensional strain effects on the superconducting properties of Nb3Sn wires.

Original languageEnglish
Article number025034
JournalSuperconductor Science and Technology
Issue number2
Publication statusPublished - 2010 Feb 23

ASJC Scopus subject areas

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

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