INVESTIGATION OF THE MULTIFILAMENTARY (NB,TI)(3)SN CONDUCTORS WITH CUNB REINFORCED STABILIZER

Multifilamentary Nb3Sn superconducting wires with Cu stabilizer reinfo rced by Cu - 16'% Nb circular layer and the filaments artificially dop ed by Ti were developed, Microstructure, mechanical properties, superc onducting parameters of (Nb,Ti)3Sn wires with round and rectangular cr oss sections were investigated. The influence of heat treatment regime s on the wires critical current density in magnetic fields up to 14T w as examined. The changes of critical current density under the axial s train at 4.2K were analyzed and distinct shift for a higher strains wi thout diminishing of the critical current was confirmed. The compariso n of obtained results with the appropriate values for the similar wire s without Cu-Nb reinforcement was made. It was shown that the Ultimate Tensile Strength and Yield Strength for the developed wires were high er ina factor of 1.5.