Heavily cold worked high-purity Ta as a reinforcing stabilizer

Author

Matsukawa, M. ; Noto, K. ; Katagiri, K. ; Matsuura, N. ; Ikebe, M. ; Takahashi, C. ; Fukutsuka, T. ; Watanabe, K.

Author_Institution

Fac. of Eng., Iwate Univ., Morioka, Japan

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

880

Lastpage

883

Abstract

Mechanical and electrical properties have been studied for a heavily cold-worked high-purity Ta wire. Tensile test at room temperature shows a large 0.2% proof stress of about 70 kg/mm², which is probably caused by work-hardening in the wire drawing process. Observations of fracture surfaces using a scanning electron microscope indicate that this material is very ductile. Moreover, this sample has a low resistivity of about 0.4 μΩ-cm even at the high field of 15 T. The residual resistivity ratio is about 80, which is consistent with the high purity of the sample. Therefore, it has been found that the cold-worked Ta wire is applicable to a reinforcing stabilizer for conductors of large-scale and/or high-field superconducting magnets

Keywords

cold working; drawing (mechanical); ductility; electrical conductivity of crystalline metals and alloys; fracture; scanning electron microscope examination of materials; superconducting magnets; tantalum; tensile strength; work hardening; 0.4 muohmcm; 15 T; Ta; ductility; electrical properties; fracture surfaces; heavy cold working; high-purity Ta wire; low resistivity; proof stress; reinforcing stabilizer; residual resistivity ratio; scanning electron microscope; superconducting magnets; tensile test; wire drawing process; work-hardening; Conductivity; Conductors; Large-scale systems; Mechanical factors; Scanning electron microscopy; Surface cracks; Temperature distribution; Tensile stress; Testing; Wire drawing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.120019

Filename

120019