Study on Fabrication of Ni-5 at.%W Tapes for Coated Conductors from Cylinder Ingots

L. Ma, H. L. Suo, Zhao Yue, Anders Christian Wulff, Y. R. Liang, Jean-Claude Grivel

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Ni-5 at.%W (Ni5W) tapes with a strong cube texture were fabricated using the RABiTS technique and by starting from cylindrical shaped ingots. In contrast to a conventional cuboid-shaped ingot, a cylinder shaped ingot has no anisotropy along the axial direction and the resulting tape will therefore, during heavy cold rolling, be characterized by a lower concentration of stress along the edges of the ingot. It can reduce fabrication costs and increase process efficiency. The fraction of cube texture on the surface of the finally recrystallized tapes was investigated using the EBSD technique. It was observed that the fraction of cube texture within 10° from the ideal {001}〈100〉 orientation was ~98% and the fraction of LAGBs was ~90%. The as-obtained tapes have a strong cube texture also very close to the edge of the tape and they would therefore increase the fraction of applicable material while simplifying the heavy rolling process. Accordingly, it suggests that this fabrication method is a good choice to most small scale research laboratories for achieving long length Ni5W tapes for coated conductors with an easy way and a higher fraction of applicable material.
Original languageEnglish
Article number7800105
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
Number of pages5
ISSN1051-8223
DOIs
Publication statusPublished - 2015

Keywords

  • Coated conductors
  • Cold rolling
  • Cube texture
  • Cylinder ingot
  • Ni-W alloy tape

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