钨锆铪活性合金破片冲击释能行为实验研究

为研究活性合金材料的冲击释能行为，采用弹道枪驱动一种高强度、高密度的钨锆铪活性合金破片，使其以不同着速撞击Q235钢靶，通过观察靶板穿孔模式和靶后冲击释能火光区的高速摄影图像，提出合金类破片冲击释能的3阶段模型，即冲击激活阶段、自蔓延释能阶段、自激活阶段。结合应力波、热应力理论和冲击温升方程，获得该破片能量的激活门限、能量完全释放的临界条件、释能火光区的最大尺寸及其靶后有效毁伤距离。研究结果表明：钨锆铪活性合金破片不仅具有类似惰性破片的动能毁伤能力，而且在穿靶前活性能耗极小，活性能量在穿靶后毫秒量级内完全释放；破片活性能量被完全激活前，释能火光区的最大毁伤容积和有效毁伤距离分别随破片着速的提高呈指数和线性增长趋势。

Experimental Research on Energy Release Behavior of W/Zr/Hf Alloy Fragment

To investigate the energy release behavior of reactive material under impacting conditions, a high-strength and high-density tungsten-zirconium-hafnium active alloy fragment is driven to impact the Q235 steel target at different speeds by a ballistic gun. A three-stage, including shock activation, self-propagation energy release, and secondary self-activation, model of impact-release energy of alloy fragments is proposed by observing the perforation pattern of steel target and the high-speed photographic image of the post-target impact-release fire zone.The activation threshold of fragment energy, the critical condition of complete energy release, the maximum size of energy release flare region and the effective damage distance behind the target were obtained by applying stress wave, thermal stress theory and shock temperature rise equation. The results show that the tungsten-zirconium-hafnium active alloy fragment not only has the kinetic energy damage ability similar to the inert fragment, but also has a little active energy consumption before the target is penetrated, and the active energy is completely released in a millisecond time regime after penetrating into the target. Before the fragmentation active energy is fully activated, the maximum damage volume and effective damage distance in the release energy flare region increase exponentially and linearly with the increase in fragmentation speed.