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通过渗流铸造的方法制备出Wf/Cu82Al10Fe4Ni4复合材料,采用分离式霍普金森压杆(SHPB)和扫描电镜(SEM)研究其动态压缩行为及断裂特性。结果表明:复合材料界面结合紧密,受冲击时体现出良好的界面结合强度;在应变率为2000s-1下动态压缩材料发生部分塑性变形,局部表面出现裂纹;在应变率为3000s-1下动态压缩材料的动态压缩强度达到2500MPa,材料内部出现钨丝劈裂、钨丝弯曲断裂以及基体合金断裂3种破坏模式。同时,在材料的断裂面上出现大量熔化带,分析认为熔化是随着应变率的提高而出现的,它改变了复合材料的断裂方式,加速了Wf/Cu82Al10Fe4Ni4复合材料的整体失效。
The Wf / Cu82Al10Fe4Ni4 composites were prepared by percolation casting. The dynamic compression behavior and fracture behavior of Wf / Cu82Al10Fe4Ni4 composites were studied by using split Hopkinson pressure bar (SHPB) and scanning electron microscopy (SEM). The results show that the interface of the composites is tightly bonded and exhibits good interfacial bonding strength when subjected to impact. Some of the plastic material under dynamic strain at 2000s-1 undergoes partial plastic deformation and cracks on the local surface. Under the strain rate of 3000s-1, The dynamic compressive strength of the compressive material reaches 2500MPa. There are three kinds of failure modes of tungsten wire splitting, tungsten wire bending fracture and matrix alloy fracture in the material. At the same time, a large amount of melting zone appears on the fracture surface of the material. It is considered that the melting occurs with the increase of strain rate. It changes the fracture mode of the composite material and accelerates the overall failure of the Wf / Cu82Al10Fe4Ni4 composite material.