Abstract
The evolution of the microstructure (sub-band size, α phase precipitation) of a Nb-47.1wt%Ti and of a Nb-45 wt%Ti-15wt%Ta alloys is followed during their simultaneous thermomechanical processing. The effects of a Ta addition, cold work prestrain, and of the temperature and duration of heat treatments on the volume fraction, size, density and localization of the particles of α phase are especially documented. Widmanstätten α strengthens the NbTiTa alloy and exerts a deleterious influence on Jc. Some solutions are proposed to these harmful effects. At last, the relationships describing the dependence of the α phase distribution on strain are also considered.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
T. Sasaki, K. Noto, and Y. Muto, “Upper Critical Fields in Ternary Superconducting Ti-Nb-Ta Alloys”, Jap. Journ. Applied Physics 24: 679 (1985).
D.G. Hawksworth, and D.C. Larbalestier, “Enhanced values of Hc2 in Nb-Ti Ternary and Quaternary Alloys”, in “Advances in Cryogenic Engineering” 26 (1980), p. 479.
P.J. Lee, and D.C. Larbalestier, “An Examination of the Properties of SSC Phase II R&D Strands”, IEEE Trans Appl. Supercond. 3: 833 (1993).
E.W. Collings. “Applied Superconductivity”, Plenum Press, New York (1986).
E. Gregory, T.S. Kreilick, F.S. von Goeler, and J. Wong, “Preliminary Results on Properties of Ductile Superconducting alloys for Operation to 10 Tesla and above”, Proc. ICEC12, Southampton [U.K.] (1988), p. 874.
H. Liu, E. Gregory, N.D. Rizzo, J.D. McCambridge, X.S. Ling, and D.E. Prober, “Experimental Results on Nb 25wt%Ta 45wt%Ti Superconducting Wire”, IEEE Trans Appl. Supercond. 3: 1350 (1993).
P.J. Lee, D.C. Larbalestier, J.C. McKinnell, and A.D. McInturff, “Microstructure Property Relationships in Nb-Ti-Ta”, IEEE Trans Appl. Supercond. 3: 1354 (1993).
C.E. Bruzek, “Optimisation de la Microstructure de Composites Supreaconducteurs Nb-Ti”, Doctoral Thesis, Université de Lille I (1993).
M.I. Buckett, and D.C. Larbalestier, “Precipitation at low strains in Nb 46.5 wt% Ti”, I.E.E.E. Trans. Mag. 23: 1638 (1987).
C. Meingast, P.J. Lee, and D.C. Larbalestier, “Quantitative Description of a High Jc Nb-Ti Superconductor during its Final Optimization Strain: I. Microstructure, Tc, Hc2, and Resistivity”, J. Appl. Phys. 66: 5962 (1989).
C. Meingast, and D.C. Larbalestier, “Quantitative Description of a Very High Current Density Nb-Ti Superconductor during its Final Optimization Strain: . II. Flux Pinning Mechanisms”, J. Appl. Phys. 66: 5971 (1989).
G.K. Zelenskiy, A.V. Arsent’ev, A.P. Golub’, V.E. Klepatsky et al., “Inluence of Thermomechanical Working Schedules on Structure and Properties of HT-50 and HT-55 Superconductors Alloys”, in: “Advances in Cryogenic Engineering, Materials” 36A (1989), p. 295.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1996 Springer Science+Business Media New York
About this chapter
Cite this chapter
Taillard, R., Florianova, E., Bruzek, C.E., Hoang-Gia-Ky (1996). Microstructure and Properties of Simultaneously Processed Nb-Ti and Nb-Ti-Ta Superconducting Wires. In: Summers, L.T. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 42. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9059-7_150
Download citation
DOI: https://doi.org/10.1007/978-1-4757-9059-7_150
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9061-0
Online ISBN: 978-1-4757-9059-7
eBook Packages: Springer Book Archive