Abstract：An in situ W/NiTi(Nb) shape memory alloy composite with a nominal composition of Ni48Ti46Nb3W3 (at. %) was fabricated by vacuum induction melting, forging and drawing. X-ray diffraction, scanning electron microscope and energy dispersive spectroscopy were employed to analyze the microstructures and tensile testing machine used to investigate the mechanical properties. It is revealed that the microstructure of the composite wire consists of tungsten submicro fibers well dispersed in the TiNi(Nb) matrix and aligned along the wire axial direction, with well-bonded interfaces. The composite wire exhibits high plateau stress up to 1. 2 GPa and high mechanical damping capacity at room temperature.
2014, Vol. 21 
