The effect of deformation by drawing at 77 K on the microstructure, critical current, and mechanical properties of Nb–Ti alloys
V. K. AksenovNational Science Center, Physicotechnical Institute, 310108 KharkovО. И. ВолчокNational Science Center, Physicotechnical Institute, 310108 KharkovV. M. GorbatenkoNational Science Center, Physicotechnical Institute, 310108 KharkovV. A. EmlyaninovNational Science Center, Physicotechnical Institute, 310108 KharkovM. B. LazarevaNational Science Center, Physicotechnical Institute, 310108 KharkovA.V. MatsNational Science Center, Physicotechnical Institute, 310108 KharkovV. S. OkovitNational Science Center, Physicotechnical Institute, 310108 KharkovYa. D. StarodubovNational Science Center, Physicotechnical Institute, 310108 KharkovO. V. ChernyĭNational Science Center, Physicotechnical Institute, 310108 KharkovL. A. ChirkinaNational Science Center, Physicotechnical Institute, 310108 Kharkov
ABI
Abstract
The structure and current-carrying capacity of the alloy Nb–51.5% Ti in the superconducting state is studied after large plastic deformations at 77 and 300 K and subsequent annealing. It is found that the specific nature of the defect structure of the alloy subjected to low-temperature strain considerably intensifies the diffusive decomposition of β-solid solution and increases the bulk concentration of the α-phase at the initial stages of annealing. In turn, this causes a noticeable increase in the critical current density.
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