着靶速度和钨丝直径对钨丝/锆基非晶复合材料弹芯侵彻性能的影响

Effect of Impact Velocity and Diameter of Tungsten Fiber on Penetration Ability of W_f/Zr-based Metallic Glass Composite Penetrator

为了研究高速撞击条件下含不同直径钨丝/锆基非晶复合材料弹芯的侵彻特性,使用含有4种不同直径钨丝的复合材料弹芯在1000~1600 m/s的速度区间进行穿甲实验。研究发现:钨丝/锆基非晶复合材料弹坑直径比钨合金小10%以上,"自锐"效果明显;理想侵彻时,存在一个阈值速度,钨丝/锆基非晶复合材料弹芯在低于该速度侵彻时,其侵彻过程中的破坏模式为类似于贫铀合金的绝热剪切破坏,而高于该阈值速度时,破坏模式变成钨丝的屈曲、回流,而且该阈值速度随着复合材料中钨丝直径的增加而增加;钨丝/锆基非晶复合材料弹芯中钨丝的直径会影响其侵彻过程中的稳定性,钨丝直径越大,该复合材料弹芯在侵彻过程中越容易出现劈裂等破坏,导致弹道偏转等。

Wf/Zr-based metallic glass composites containing four kinds of tungsten fiber with different diameters were prepared.Penetration experiments were taken to perforate homogeneous armor steel at velocity from 1000 m/s to 1600 m/s.The results demonstrate that both the diameters of the tungsten fiber and the impact velocity are critical parameters for penetration ability.Firstly,the crater diameter of Wf/Zr-based metallic glass composites is more than 10% smaller than that of tungsten,which illustrates that the Wf/Zr-based metallic glass composite keeps self-sharpening during the penetration process.Next,the failure mechanism of Wf/Zr-based metallic glass composite changes from adiabatic shear failure to the tungsten fiber buckling and back-flow due to the impact velocity increasing.The smaller the diameter of tungsten fiber is,the more stable the penetration process would be,because the stability of penetration is affected by the diameter of the tungsten fiber.