一种高强钛合金靶材的穿甲损伤行为

采用一种钛合金靶材进行穿甲侵彻实验,通过弹坑解剖分析钛合金靶板穿甲破坏形貌,研究了该高强度钛合金靶板的损伤行为。结果表明:开坑阶段,弹丸头部比较容易进入靶板内部,在靶板表面首先产生金属堆积,没有发生过热的金属熔化现象。弹丸进入稳定侵彻阶段,形成绝热剪切带。绝热剪切带形成后,和周围材料不协调,成为微裂纹和微孔洞的起源。在一定的条件下,裂纹沿绝热剪切带萌生、扩展,形成了沿整个绝热剪切带的大裂纹,最终在穿孔表面形成碎片,从靶板上脱离,造成靶板的破坏。

Penetration Damaging Behavior of a Sort of High Strength Titanium Alloy Target

The damage behavior of a sort of high strength titanium alloy target was studied by armor piercing test. The characteristics and the mechanism of damaging were analyzed according to damage appearance of the armor plate. Results show that at the opening stage, the bullet head enters more easily the target board, and metal accumulation is found on the target plate surface, but there is no overheated metal melting phenomenon. The adiabatic shear band is found at the stable stage. The large non-homogeneous deformation in adiabatic shear bands causes microcracks and micropores. The cracks initiate and propagate along adiabatic shear bands and these large cracks result in falling of fragments from the surface of penetrated hole. As a result, the armor plate is deteriorated.