【摘要】 利用粉末冶金工艺制备了一种高密度钨锆钛（W-Zr-Ti）活性合金，其具有密度高、强度大和能量释放强的优点，兼具优异的动能侵彻和反应释能效应。利用动态冲击试验发现该合金具有应变率强化效应，并通过数字图像处理技术和热化学分析研究了其能量释放特性。结果表明，在5784 s^-1应变率下，W-Zr-Ti活性合金的材料抗压强度高达2.25 GPa，其在961 K左右发生点火放热反应。基于爆炸测试及冲击波理论，发现材料冲击压力和冲击能量阈值分别小于35.77 GPa和5.18×10⁴ kJ/m²。此外，揭示了材料断裂行为和失效模式的转变机制，其导致了材料强度及反应程度在动态加载下的显著提高。更多还原

【Abstract】 A high-density tungsten-zirconium-titanium（W-Zr-Ti） reactive alloy was prepared by powder metallurgy. This alloy exhibits high density, high strength, and violent energy release characteristics, resulting in outstanding penetration and ignition abilities. Dynamic impact experiment demonstrated its strain rate hardening effect, and the energetic characteristics were investigated by digital image processing technique and thermal analysis experiment. The results show that W-Zr-Ti reactive alloy performs compressive strength of 2.25 GPa at 5784 s^-1 strain rate, and its exothermic reaction occurs at about 961 K. Based on the explosion test and shock wave theory, thresholds of enhanced damage effect are less than 35.77 GPa and 5.18×10⁴ kJ/m² for shock pressure and energy, respectively. Furthermore, the transformation of fracture behavior and failure mechanism is revealed, which causes the increase in compressive strength and reaction intensity under dynamic loading.更多还原