Effect of Titanium Addition on Mechanical Properties at Elevated Temperatures of Bronze Alloys

Abstract

At the moment, Nb₃Sn superconducting wires are world–widely made by the bronze method, which is the fabrication process of Nb₃Sn superconducting phase through the diffusion reaction at the interface between Nb filaments and bronze (Cu–Sn) alloy matrix. In general, a small amount of Ti is added to the bronze matrix, because Ti substitution to the Nb₃Sn crystal structure increases the upper critical field (B_c2) as well as it promotes the formation of Nb₃Sn phases. Meanwhile, Ti addition should also affect microstructures and mechanical properties of a bronze alloy itself. In this study, the effect of Ti addition on microstructures and mechanical properties especially at elevated temperatures were investigated.