Property analysis and brazing preparation of NiTi/NiTiNb composite sheet

The microstructure of interface and bending deformation behavior of composite sheet,which was brazed by AgCu eutectic brazing alloy,were investigated. The results reveal that the brazing joint has good mechanical properties,and the bending angle of the brazed plates reaches 120å at room temperature or 0℃ without fracture. The composite sheet shows good shape memory effect,and the shape recovery temperature has a larger range between the shape recovery temperatures of these two alloys,which is resulted by the deformation compatibility of the two alloys. The stress-strain curves of the composite sheet show obvious hysteretic loop and indicate good damping characteristic at room temperature or 0℃.