Microstructural properties and magnetic testing of spot-welded joints between Nb-Ti filaments

Conference item

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.

Authors: Brittles, GD; Aksoy, C; Grovenor, CRM; Bradshaw, T; Milward, S

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IEEE
• Host title: IEEE Transactions on Applied Superconductivity
• Journal: IEEE Transactions on Applied Superconductivity
• Volume: 26
• Issue: 3
• Article number: 8800304
• Publication date: 2016-02-11
• Acceptance date: 2016-02-02
• DOI: 10.1109/TASC.2016.2529290
• ISSN: 1558-2515
• Language: English
• Keywords: superconducting joint; joint microstructure; persistent current mode; spot welding; Nb–Ti joints