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

2016; IEEE Council on Superconductivity; Volume: 26; Issue: 3 Linguagem: Inglês

10.1109/tasc.2016.2529290

1558-2515

Greg Brittles, Canan Aksoy, C.R.M. Grovenor, T. Bradshaw, S. Milward, Susannah Speller,

Superconductivity in MgB2 and Alloys

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.