The degradations of superconducting properties by mechanical strain on actual Nb3Sn wire are a serious problem for the future fusion magnets operated under high electromagnetic force. Recently, we succeeded to fabricate Cu-Sn-Zn ternary alloy matrix, which is high strength alloy by the Zn solid solution strengthening, based on the internal reinforced bronze process in order to investigate the mechanical strength improvement. In this study, the upper critical magnetic field (Hc2) under uniaxial tensile deformation on several bronze-processed Nb3Sn multifilamentary wires were evaluated. We confirmed that the peak tensile strain values, which obtained maximum Hc2 under uniaxial tensile deformation, were shifted to higher tensile strain region with increasing amount of Zn composition in the Cu-Sn-Zn ternary alloy matrix. The internal reinforced bronze matrix via solid solution strengthening would become attractive and simple method without reinforcement material.
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 2019 Jun 3|
|Event||27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018, ICEC-ICMC 2018 - Oxford, United Kingdom|
Duration: 2018 Sept 3 → 2018 Sept 7