摘要:
块体金属玻璃具有极高的力学强度,存在潜在的军事应用价值,实现其应用的关键在于认识材料在高应变率下的动力学行为特性。为此,利用飞片驱动速度可达3.5 km/s 的电炮加载装置,对一种新制备的锆基块体金属玻璃的动力学响应进行了实验研究。实验中,基于高精度DPS激光干涉仪测得的样品/窗口界面粒子速度波剖面,获得了新材料在应变率约为106/s下的冲击响应特性参数。在加载压力15~25GPa 范围下,确定的 Hugoniot弹性极限约为2.4GPa,线性拟合得到的冲击 Hugoniot关系为Ds=(4.4±0.1)+(0.58±0.08)up。
Abstract:
As a novel material with high strength,bulk metallic glass received concern of many researchers all over the world.For potential military applications,it was important to un-derstand the dynamic response of this material under high strain rate.To this end,Electric Gun was chosen to study dynamic response of a newly prepared Zr-based bulk metallic glass.In the E-lectric Gun experiments,the velocity of electric explosion driven plastic flyer in 0.5 mm thick-ness could reach 3 .5 km/s.Based on bulk metallic glass sample/window interface particle veloci-ty profiles measured by high resolution DPS laser interferometer,two important dynamic behav-iors were obtained under high strain rate about 106/s.In a shock pressure range of 15~25GPa, the Hugoniot elastic limit was determined to be about 2 .4GPa,and the shock wave velocity (Ds) vs.particle velocity (up)Hugoniot data were linearly fitted by Ds= (4.4±0.1)+(0.58±0.08)up.
点击查看大图
下载:
