Mechanical properties of Nb/sub 3/Sn stranded superconducting potted cable windings

Journal Article · Sun May 01 04:00:00 EDT 1983 · IEEE Trans. Magn.; (United States)

DOI:https://doi.org/10.1109/TMAG.1983.1062358· OSTI ID:5612449

Caspi, S; Meuser, R; Wolgast, R

The electromagnetic stresses in projected designs of high-field magnet coils sometimes exceed the yield points or creep strengths of the presently used coil winding materials. This is especially true of reactafter-winding Nb/sub 3/Sn coils, plastic insulating materials, and the crossed strands of twisted cable. This report presents compression stress-strain curves of stranded and twisted flat cable coil winding specimens for reacted and epoxy-impregnated Nb/sub 3/Sn coils, at 300 K and 80 K. The lateral and longitudinal strains of one specimen were measured along with the direct compressive stress-strain, at 300 K. A similar specimen was compressed to 40 MPa (6 kpsi) at room temperature and then to 145 MPa (20 kpsi) at 80 K. Plastic flow occurred up the maximum stress. Stress cycles subsequent to maximum stress were elastic. Some specimens were mounted in a rigid enclosure to simulate hydrostatic containment of the magnet coil. Pure annealed Cu was tested at 300 K, and pure epoxy was tested at 300 and 80 K. In addition the thermal contractions from 300 to 80 K were measured.

• Research Organization: Lawrence Berkeley Lab., Univ. of California, Berkeley, CA 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5612449
• Journal Information: IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. 19:3; ISSN IEMGA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CABLES
COMPRESSION
CONDUCTOR DEVICES
CREEP
ELECTRIC CABLES
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC FIELDS
EPOXIDES
EQUIPMENT
INTERMETALLIC COMPOUNDS
MAGNET COILS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
STRESSES
SUPERCONDUCTING CABLES
TIN ALLOYS
WINDING MACHINES