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Tensile strain dependence of critical current of RHQ-Nb3Al wires

Authors :
Akira Yamamoto
Hidetoshi Oguro
Takayoshi Ito
Takao Takeuchi
Kiyosumi Tsuchiya
Akihiro Kikuchi
Xinzhe Jin
Toru Ogitsu
Tatsushi Nakamoto
Satoshi Awaji
Stefanus Harjo
Source :
Cryogenics. 52:805-809
Publication Year :
2012
Publisher :
Elsevier BV, 2012.

Abstract

Nb 3 Al superconducting wires produced by rapid heating and quenching (RHQ) have been developed for high-field accelerator magnets. It is known that critical currents of A15 superconductors (e.g., Nb 3 Al and Nb 3 Sn) have a dependence on stress/strain. It is thus important to clarify the stress/strain behavior of the RHQ-Nb 3 Al wires for the development of high-field accelerator magnets. We recently started experimentally investigating the strain dependence of the critical current of the RHQ-Nb 3 Al wires with a Ta interfilament by measuring their critical currents under longitudinal tensile strains. To evaluate the effect of residual strain in Nb 3 Al filaments induced by thermal contraction of the materials in the wire, neutron diffraction measurements were performed at room temperature.

Details

ISSN :
00112275
Volume :
52
Database :
OpenAIRE
Journal :
Cryogenics
Accession number :
edsair.doi...........57edb32f3789bad2d598e85e84ff7b3d
Full Text :
https://doi.org/10.1016/j.cryogenics.2012.09.006