钛合金装甲材料动态压缩力学性能及其抗弹能力关系

Relationship between Dynamic Compressive Mechanical Properties and Ballistic Performance of Titanium Armor Materials

摘要:

采用分离式Hopkinson Bar技术针对不同热处理制度的TC6、ATI425以及TC3钛合金Φ5 mm×5 mm圆柱形标样进行了动态压缩实验，测定得到了试样在3000 s-1高应变率条件下的动态强度、动态塑性及冲击吸收功；同时开展了以钛合金为面板、A3钢为背板的复合装甲抗弹性能试验，分析了钛合金动态力学性能与其抗弹性能之间的关系。结果表明：钛合金面板的抗弹性能与其动态强度和动态塑性均密切相关；钛合金的动态强度对材料抗弹性能的影响比动态塑性更加显著，其抗弹性能主要取决于动态强度；同时，表征钛合金动态力学性能优劣的冲击吸收功不能直接反映钛合金的抗弹能力；较大区域的正面开坑和较小的剪切充塞可以明显提高钛合金面板的抗弹性能。

Abstract:

Dynamic compression experiments have been conducted for TC6 titanium alloy, ATI425 titanium alloy and TC3 titanium alloy by a split Hopkinson Bar process. These titanium alloys were prepared by different heat treatment processes, and the size of cylindrical standard samples was Φ5 mm×5 mm. On the basis of the dynamic compression experiments, the dynamic strength, plasticity and impact absorbed energy under the strain rate of 3000 s-1 were obtained. Meanwhile, the ballistic performance test was carried out. The armor targets were made up of a titanium panel and a A3 steel backplane. Therefore, the relationship between dynamic mechanical properties and ballistic performance of titanium alloys can be revealed. The results show that the ballistic performance of titanium panel is closely related to its dynamic strength and plasticity. Noticeably, the influence of dynamic strength on ballistic performance is more significant than that of dynamic plasticity; the ballistic performance is mainly determined by dynamic strength. Meanwhile, the impact absorbed energy cannot directly reflect ballistic performance of titanium alloy, and a large front crater and smaller plugging destroy can significantly improve the ballistic performance of titanium panel.