Damage effect of W0.75NbTiZr high-entropy reactive fragment penetrating spaced target plate

High-entropy alloys have become a research hotspot in damage materials owing to the properties they exhibit compared to traditional inert alloys. In this study, the damage effect of W0.75NbTiZr high-entropy reactive fragment on the spaced target plate was studied by combining theoretical research with ballistic gun experiments. The theoretical models was established to analyse the impact response of the reactive fragment, the behaviour of the debris cloud, and the damage power on the rear target plate, which were validated using the experimental results. The results revealed that, the reactive fragment formed an ellipsoidal coupled energy region after penetrating the front target plate, resulting in kinetic and chemical energy coupling damage on the rear target plate. Due to the remaining kinetic energy and the maximum scattering angle of the reactive fragment increased with the impact velocity, the expansion ability of the coupled energy region was stronger, and the influence area on the rear target plate was larger. However, the energy was dispersed for the expansion of the coupling energy region, the damage area on the rear target plate showed a first increasing and then decreasing trend. The theoretical results are in good agreement with the experimental results. The theoretical analysis method can be applied to the performance design of the reactive fragment and the damage power prediction on the spaced target plate.