超高速撞击下47Zr45Ti5Al3V合金的宏观与微观响应行为  

Macro-and Micro-Damage Behaviors of 47Zr45Ti5Al3V Alloy in Hypervelocity Impact

作　　者：张品亮[1] 龚自正[1] 曹燕[1] 李宇[1] 徐坤博[1] 牟永强[1] 武强[1] 宋光明[1] 

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《高压物理学报》2017年第3期231-238,共8页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金青年科学基金(11505299);技术基础科研项目(JSHS2015203B002)

摘　　要：为了研究新型锆钛合金47Zr45Ti5Al3V在空间微小碎片环境中的适用性,采用激光驱动微小飞片超高速撞击方式,开展了微小飞片单次和累积多次超高速撞击实验。采用表面轮廓仪测量了撞击坑深度,由此获得了在撞击速度范围内撞击坑深度与飞片速度、累积撞击次数的关系。通过扫描电镜和透射电镜研究了撞击坑周围的微观组织结构和形貌,发现在撞击坑周围没有形成微空洞、微裂纹、绝热剪切带等缺陷,也没有观测到明显的细化晶粒。此外,X射线衍射谱显示撞击坑周围仍然保持α和β两相结构,但是α→β相变使β相的含量增加。可以认为,新型合金47Zr45Ti5Al3V在超高速撞击后仍具有稳定的组织结构和机械性能,在空间微小碎片环境中具有较好的应用前景。To assess the suitability of 47Zr45Ti5Al3V alloy used in the future spacecraft in a space debris environment, we performed single and repeated hypervelocity impact experiments on a laser driven mini-flyer system. The crater depth in the recovered target was measured by a surface profile meter. The relationship between the crater depth and the velocity of flyer and the relevance of the crater depth and impact frequency were obtained. We also studied the microstructural changes and micro-damage behaviors of 47Zr45Ti5Al3V alloy using a scanning electron microscope and a transmis- sion electron microscope. The results show that there are no micro-cracks, micro-voids, adiabatic shear bands or dynamic recrystallization in the region adjacent to the crater. In addition, the X-ray diffraction pattern of the bottom of the crater reveals that a and p phases coexist and α→β phase transition occurs,suggesting that the 47Zr45Ti5Al3V alloy exhibits good characteristics of structural stability and mechanical properties after hypervelocity impact, and it is a potential structural material for improving protection against orbital debris impacts on the future spacecraft.

关 键 词：空间碎片 47Zr45Ti5Al3V 超高速撞击 宏观损伤 微观损伤 

分 类 号：O521.2[理学—高压高温物理]