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Microstructural Properties and Magnetic Testing of Spot Welded Joints between Nb-Ti Filaments

DOI: 10.1109/TASC.2016.2529290 DOI Help

Authors: Greg Brittles (University of Oxford) , Canan Aksoy (University of Oxford) , Chris Grovenor (University of Oxford) , Tom Bradshaw (STFC) , Stephen Milward (Diamond Light Source) , Susannah Speller (Department of Materials, University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Ieee Transactions On Applied Superconductivity , VOL 26 (3)

State: Published (Approved)
Published: April 2016

Abstract: The production of persistent-mode joints between Nb–Ti conductors remains an important problem in the field of superconducting magnets. Several researchers have demonstrated spot welding (resistance welding) as a technique capable of yielding superconducting joints directly between Nb–Ti filaments. In this study, the characteristic microstructural features associated with spot-welded joints between both multifilamentary and monofilamentary Nb–Ti wires are presented. Some initial measurements of the current-carrying ability of a monofilamentary joint have also been made by a novel magnetic technique. The suitability of spot welding for commercial magnet manufacture is discussed.

Journal Keywords: Spot welding, Nb-Ti joints, superconducting joint, persistent current mode, joint microstructure.

Subject Areas: Physics

Technical Areas: