钨丝直径对锆基复合非晶材料穿甲性能的影响

Effect of Tungsten Fiber Diameter on Penetration Ability of Zr-based Metallic Glass Composites

针对4种不同直径钨丝/锆基非晶复合材料弹芯,在(1270±40)m/s撞击速度,开展了侵彻均质半无限装甲钢板实验研究,并与普通钨合金进行了对比。研究发现,在相同的制备工艺条件下,钨丝直径对该复合材料弹芯侵彻效果影响较大,主要表现:(1)在理想侵彻的条件下,钨丝直径对该种材料的侵彻性能影响较大,弹丸侵彻深度和钨丝直径关系曲线是凸的,Φ0.7 mm钨丝方案丸侵彻深度最大,最大侵彻深度为55 mm,相对于钨合金材料威力提高了25%,其根本原因是Φ0.7 mm钨丝方案在侵彻过程中呈现与铀合金类似的绝热剪切破坏特征,弹坑底部呈现90o的自锐角。(2)钨丝直径对弹芯在高速条件下的侵彻体头部破坏形式有着重要的影响,随着钨丝直径的增加,其头部的破坏模式随直径变化存在一个从变形+劈裂+弯曲+断裂的复合破坏模式到绝热剪切破坏演变过程,然后又从绝热剪切向复合模式破坏转变。

Penetration experiments were conducted for Zr-based metallic glass composites containing tungsten fibers with different diameters of 0.3, 0.5, 0.7, 1.0 mm to perforate homogeneous armor steel at velocity of （1270±40） m/s. Meanwhile their characteristics and depths of penetration were compared with those of tungsten alloy. Results demonstrate that under the same preparation condition, the diameter of the tungsten fiber is a critical parameter for penetration ability. Firstly, the curve of the diameter of the tungsten with the penetration depth is convex when it perforates ideally and the composite containing 0.7 mm tungsten fiber obtains the maximum penetration depth of 55 mm which is increased by 25% compared with that of tungsten alloy because the failure mode is adiabatic shear failure during the penetration similar to that of the depleted uranium alloy exhibiting a crater of 90 at bottom. Secondly, the diameter of tungsten fiber influences the failure mode of the head of the composites significantly. With the increasing of the tungsten fiber diameter, the failure mode ranges from a composite failure mode that includes deformation, splitting, bending and crack to adiabatic shear failure and then it turns to composite failure mode again.