Bending strain in prereacted Nb_3 Sn conductors

Article type: Research Article

Authors: Deviatkin, E.A.^a

Affiliations: [a] Institute for Problems in Mechanics of Russian Academy of Sciences, Vernadskogo 101/1, Moscow 119526, Russia. Tel.: +7 495 1433517; E-mail: [email protected]

Abstract: The bending strain in the Nb_3 Sn composite superconductors can cause degradation of the critical current in a significant portion of superconducting filaments. For a correct estimate of the bending strain in the "react and wind" coil conductors it is necessary to take into account that they can be deformed plastically during insulation and winding processes. Cases of plastic deformation due to the tensile stress in a macroscopically homogeneous multifilamentary composite superconductor the prestress of which is smaller than the yield stress in tension are considered in the paper.

Keywords: Prereacted Nb[TeX:] _3 Sn composite superconductors, plastic straightening and bending with tension, "react and wind" coils, degradation of the critical current, prebending treatment, transverse stress effect, distortion of the σ –ε diagrams

DOI: 10.3233/JAE-2008-938

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 4, pp. 243-250, 2008