Abstract
The effect of greatly restricting heat treatment time and temperature, as well as the strain space between heat treatments was investigated for a high homogeneity Nb46.5wt% composite. The number of heat treatments was 3 or 6. It was found that the crucial heat treatment was the final one and that the initial ones could be considerably restricted. A strong linear relationship was found between J c (5T, 8T) and the % α-Ti for J c (5T) values ranging from ~ 950–3050 A/mm2 and α-Ti contents ranging from 2.5 to 21 vol%.
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References
P. J. Lee, J. C. McKinnell, and D. C. Larbalestier, Microstructure control in high Ti NbTi alloys, IEEE Trans. Mag. MAG-25:1918 (1989).
P. J. Lee and D. C. Larbalestier, Development of nanometer scale structures in composites of Nb-Ti and their effect on the superconducting critical current density, Acta Metall. 35:2523 (1987).
Li Chengren and D. C. Larbalestier, Development of high critical current densities in niobium 46.5wt% titanium, Cryogenics 27:171 (1987).
P. J. Lee and D. C. Larbalestier, Determination of the flux pinning force of α-Ti ribbons in Nb46.5wt%Ti produced by heat treatments of varying temperature, duration and frequency, J. Mat. Sci. 23:3951 (1988).
P. J. Lee and D. C. Larbalestier, unpublished, Applied Superconductivity Center, Univ. of Wisconsin-Madison.
R. M. Scanian, J. Royet, and R. Hannaford, Evaluation of various fabrication techniques for fabrication of fine filament NbTi superconductor, IEEE Trans. Mag. MAG-23.1719 (1987).
M. I. Buckett and D. C. Larbalestier, Precipitation at low strains in Nb46.5wt%Ti, IEEE Trans. Mag. MAG-23:1638 (1987).
A. W. West and D. C. Larbalestier, Microstructural changes produced in multi-filamentary Nb-Ti composite by cold work and heat treatment, Met. Trans. A 15:843 (1984).
P. J. Lee, Enhancement of atomic number contrast for image analysis of highly strained materials, in: “Proc. 45th Ann. Meeting of EMSA,” ed. G. W. Bailey, San Francisco Press (1987) p. 358.
W. H. Warnes and D. C. Larbalestier, unpublished, Applied Superconductivity Center, Univ. of Wisconsin-Madison.
H. Gotoda, K. Osamura, M. Furusaka, M. Arai, J. Suzuki, P. J. Lee, D. C. Larbalestier, and Y. Monju, Influence of microstructure on the flux pinning in multifilamentary Nb-Ti wires, to be published in Phil. Mag. (1989).
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© 1990 Plenum Press, New York
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Lee, P.J., McKinnell, J.C., Larbalestier, D.C. (1990). Restricted, Novel Heat Treatments for Obtaining High Jc in Nb46.5wt%Ti. In: Reed, R.P., Fickett, F.R. (eds) Advances in Cryogenic Engineering Materials . An International Cryogenic Materials Conference Publication, vol 36. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9880-6_37
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DOI: https://doi.org/10.1007/978-1-4613-9880-6_37
Publisher Name: Springer, Boston, MA
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