We have measured the field ( B ) and strain (ε) dependence of the critical current ( I c ) in Nb 3 Al conductors, prepared by the rapid-heating, quenching and transformation (RHQT) technique. The measurements were made using a modified Walters spring (WASP) at fields up to 21 T, and at 4.2 K. The measurements at the highest field have given a clear field dependence of the I c versus ε curve, which has enabled us to evaluate the wire's absolute characteristics over wide field and strain ranges. The data were well fitted with empirical scaling laws with specifically given constants for the Nb 3 Al wires. The strain sensitivity of the transformed Nb 3 Al wire is also compared with a low-temperature diffusion processed wire.
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Banno et al. (2005) studied this question.
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