Abstract
The effect of severe plastic deformation on the decomposition of supersaturated solid solution has been investigated. A study has been performed on a metastable niobium-titanium alloy (NT-50). It has been established that an increase in the true plastic prestrain of the NT-50 alloy from 4 to 7.6 leads to the significant acceleration of supersaturated solid solution decomposition at all treatment times (from 50 to 2000 h). The volume fraction of the precipitated α-Ti phase increases by ∼(40–50)%. The true prestrain growth brings changes in the mechanisms responsible for the increase in the fracture of the precipitated phase. At the increased true prestrains, the volume fraction of the phase increases with growing sizes of precipitates at a constant and even slight decrease in their density, while at smaller true prestrains, the growth occurs at the expense of the increased number density of the precipitated particles with approximately the same sizes.
Similar content being viewed by others
References
P. J. Lee, Abridge Metallurgy of Ductile Alloy Superconductors. Wiley Encyclopedia of Electrical and Electronics Engineering (Wiley, New York, 1999), pp. 75–87.
O. V. Chernyj, G. F. Tikhinskij, G. E. Storozhilov, M. B. Lasareva, L. A. Kornienko, N. F. Andrievskaya, V. V. Slezov, V. V. Sagalovich, Ya. D. Starodubov, and S. I. Savchenko, “Nb-Ti superconductors of a high current-currying capacity,” Supercond. Sci. Tech. 4, 318–323 (1991).
O. V. Chernyj, G. E. Storozhilov, G. F. Tikhinskij, V. F. Gogulya, V. L. Mette, Yu. A. Gulyajkin, G. A. Gaintsev, A. K.-S. Tsoraev, L. D. Bogdanova, and Yu. A. Belozyorov, “Production of Nb-Ti superconductors of a high critical current density,” Cryogenics 32, ICMC Suppl., 601–604 (1992).
O. V. Chernyj, N. F. Andrievskaya, V. O. Ilicheva, G. E. Storozhilov, and L. G. Udov, “Studies on the diffusion decomposition and J c in strongly deformed Nb-Ti alloy,” Adv. Cryog. Eng. 44, 851–857 (1998).
L. D. Cooley, P. J. Lee, and D. C. Larbalestier, “Conductor Processing of Low-T c Materials: The Alloy Nb-Ti,” in Handbook of Superconducting Materials (Institute of Physics, Bristol, 2003), Vol. I, Ch. B.3.3.2, pp. 603–639.
M. I. Buckett and D. C. Larbalestier, “Precipitation at low strains in Nb-46.5 wt % Ti,” IEEE Trans. Magn. 23, 1638–1641 (1987).
V. V. Slezov and V. V. Sagalovich, “Diffusive decomposition of solid solutions,” Phys.-Usp. 30, 23–45 (1987).
Yu. M. Ustyugov, “Influence of preliminary deformation on the second-phase-particle size distribution in aging alloys,” Phys. Met. Metallogr. 104, 548–555 (2007).
V. V. Slezov, O. V. Cherny, and O. V. Davydov, “Critical current density and magnetic pinning in Nb-Ti superconductor,” Supercond. Sci. Tech. 18, 1–6 (2005).
G. E. Storozhilov, N. F. Andrievskaya, M. A. Tikhonovskii, M. P. Starolat, I. N. Shapoval, V. A. Beloshenko, N. I. Matrosov, and V. V. Chishko, “Processes of structure formation in NT 50 superconducting alloy under combined action of SPD of different types,” Fiz. Tekh. Vys. Davl. 21(1), 102–111 (2011).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © G.E. Storozhilov, N.F. Andrievskaya, M.A. Tikhonovskii, 2014, published in Fizika Metallov i Metallovedenie, 2014, Vol. 115, No. 7, pp. 756–762.
Rights and permissions
About this article
Cite this article
Storozhilov, G.E., Andrievskaya, N.F. & Tikhonovskii, M.A. Diffusional decomposition of a strongly deformed Nb-Ti alloy. Phys. Metals Metallogr. 115, 710–715 (2014). https://doi.org/10.1134/S0031918X14050093
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031918X14050093