中文摘要：

通过真空感应熔炼、锻造及拔丝工艺制备了成分源于Ni48Ti46Nb3W3（原子分数）的W／NiTi（Nb）形状记忆合金原位自生复合材料，采用X射线衍射仪、扫描电镜、能谱仪及拉伸试验机研究了其微观组织结构与力学性能。结果表明：复合材料丝材中w呈横截面为片状的亚微米级纤维，且沿丝轴向均匀分布在NiTi（Nb）基体中，两组元界面结合良好；该复合材料丝材在室温下平台应力达1．2GPa，并呈现高机械阻尼性能。

英文摘要：

An in situ W/NiTi（Nb） shape memory alloy composite with a nominal composition of Ni48 Ti46 Nb3W3 （at. ~） was fabricated by vacuum induction melting, forging and drawing. X-ray diffraction, scanning electron mi- croscope and energy dispersive spectroscopy were employed to analyze the microstructures and tensile testing ma- chine used to investigate the mechanical properties. It is revealed that the microstructure of the composite wire con- sists 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.