Evaluation of conductor sheath alloys for a forced-flow Nb/sub 3/Sn Superconducting magnet coil for the large coil program
During manufacture of the Nb/sub 3/ Sn superconductor for the LCP the final heat treatment was found to cause a significance loss of tensile ductility and fracture toughness properties of the conductor sheath alloy at 4 K; the weld metal regions were found to be particularly susceptible. This necessitated a testing program with the purpose of selecting and qualifying an alloy which would successfully replace Nitronic 40, the original alloy, and in this paper the work of that program is presented, from a description of its procedures and acceptance criteria to a comparative analysis of the final candidates for the new sheath alloy: A-286, JBK-75, and Kromarc 58. Each of them satisfied the acceptance criteria. JBK-75 was selected for its greater reliability and intrinsically better weldability over A-286, and for its greater commercial availability over Kromarc 58.
- Research Organization:
- Westinghouse Fusion Power Systems, Pittsburgh, PA
- OSTI ID:
- 6009576
- Report Number(s):
- CONF-810835-
- Journal Information:
- Adv. Cryog. Eng.; (United States), Vol. 28; Conference: 1981 cryogenic engineering conference, San Diego, CA, USA, 10 Aug 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
36 MATERIALS SCIENCE
LARGE COIL PROGRAM
SUPERCONDUCTING COILS
NIOBIUM ALLOYS
COVERINGS
TIN ALLOYS
CRYOGENICS
HELIUM
IRON BASE ALLOYS
PERFORMANCE TESTING
ALLOYS
ELEMENTS
FLUIDS
GASES
IRON ALLOYS
NONMETALS
RARE GASES
TESTING
420201* - Engineering- Cryogenic Equipment & Devices
360100 - Metals & Alloys