高强度低成本Ti5322合金的抗弹性能及其抗弹机理研究

Investigation of Ballistic Performance and Failure Mechanism of the High Strength Low-cost Ti5322 Alloy 郑超;朱秀荣;辛海鹰;邵志文;周伟;辛社伟;葛鹏;

摘要:

采用底推式105 mm长杆穿甲模拟弹,对厚度为45 mm的高强度低成本Ti5322合金靶板开展了终点弹道侵彻实验,研究了该合金的抗弹性能与抗弹机理,并探究了合金的典型抗弹效应——倾角效应。结果表明,Ti5322合金的质量防护系数为1. 80,空间防护系数为1. 02。Ti5322合金的损伤机制和抗弹机理是通过自身的绝热剪切局域化行为实现的。这种绝热剪切局域化行为,一方面通过靶板的变形破碎协调了弹体侵入过程的挤凿作用;另一方面,弹靶作用过程中发生的弹靶互侵蚀行为有效地消耗了弹体动能。

Abstract:

Ballistic performance and failure mechanism of the high-strength low-cost Ti5322 alloy with thickness of 45 mm impacted by the 105 mm rod-like armor piercing simulating projectile were investigated,and the effect of impact angle on ballistic performance was also discussed. The results show that,the mass efficiency Emis about to be 1.80,and the space efficiency Esis about to be 1. 02. Analysis of the macro-and micro-damage features of the perforated Ti5322 alloy conduced find that,the behavior of adiabatic shear bands plays a key role in failure mechanism. As was observed,the eroding between the 105 mm rod-like armor piercing simulating projectile and the Ti5322 alloy facilitate the deformation and fragmentation of the target on the one hand,and on the other hand,effectively absorbe and consume the mass and the energy of the rod-like projectile.