钨丝/锆基非晶合金复合材料的动态力学特性

研究不同体积分数的W丝／Zr基非晶合金复合材料的应力—应变响应和动态断裂特征以及断口形貌．利用Hopkinson压杆冲击加载装置和扫描电子显微镜(SEM)以及X射线衍射(XRD)，对圆柱形复合材料试样进行了相关研究．研究结果表明：Zr基非晶合金复合材料具有很高的动态压缩强度，随着W丝体积分数的增加，材料的动态压缩强度也增加，当W丝体积分数达到60％时，复合材料动态压缩强度达到2650MPa；断裂表面呈现剪切与W丝劈裂、屈曲混合破坏模式；Zr基非晶体在动态压缩条件下出现了显著的热软化和熔化特征．

Dynamic Mechanical Characteristics of W fiber/Zr-Based Amorphous Matrix Composites

Dynamic mechanical properties and fracture characteristics as well as the fracture surfaces of W fiber/Zr based amorphous matrix composites are investigated by means of Hopkinson's pressure bar and SEM alongside with for cylinder composites samples. The experimental results show that the W fiber/Zr based amorphous matrix composites have very high values in their dynamic compressive strength, and the dynamic compressive strength increases with the W fiber volumetric fraction. The dynamic compressive strength of the composites is 2 650 MPa with 60 vo1% continuous tungsten fiber, and the failure mode is of a mixed mode combining shear with the W fiber buckling and splitting. The dynamic compressive process discloses the typical melt and solidification characteristic of Zr based amorphous matrix.