Dynamic Response and Numerical Interpretation of Three Kinds of Metals for EFP Liner under Explosive Loading

In order to study the dynamic response of tungsten heavy alloy materials under explosive loading, two kinds typical alloys for explosively formed projectile (EFP) liner and one kind existing EFP were tested in a flash X-ray experiment, with copper as reference. Results showed that could form coherent EFP, while 90W–9Ni–Co W–25Re liners fractured different extents. The microscopic features three metals examined compared original liner, microstructure evolutions loading analyzed fracture model mechanism alloys’ determined. Associated stress strain conditions by numerical simulation, can be analyzed. crack-tip plastic zones are much smaller than copper, due severe concentration at tip cracks, it is easy cracks propagate trigger cleavage alloys. value zone r(?) used explain phenomenon which an alternative guideline material selection criteria liner. research results significant understanding forming, evolution,