熔化状态下锡样品微喷射现象的诊断

摘要

It is a big challenge for measuring the rapidly-increasing ej ecta from the melted metal sample under intense shock loading.In this work,we experimentally investigated the ej ecta mass,density and velocity distri-butions on a melted Sn target by adopting the Asay-F-window technique,and focused on the influence of the surface machined states on the ej ecta properties.Our results show that the surface perturbation plays a domi-nate role in the amount,velocity and spatial distribution of the ej ected particles,and these quantities tend to increase with the increasing of the surface roughness when the Sn is melted on shock or release.Our research is expected to contribute a lot to better understanding the ej ecta behavior and constructing the physical ej ecta source model for melted metal upon shock or release.%强冲击熔化状态下，金属样品表面微喷射大幅增加，难以诊断。针对该问题，利用Asay-F窗技术，通过实验诊断，得到了熔化状态下不同表面加工状态锡样品表面微喷射物质的质量、密度、速度和空间分布等信息，分析了表面加工状态对表面喷射物质量及特征的影响。结果发现，对于熔化状态的金属样品，表面粗糙度仍是决定微喷射物质量大小、速度及空间分布的重要因素，且相关特征均呈现随表面粗糙度增大而增大的趋势。研究结果为认识熔化状态下材料的微喷特性及构建物理模型提供了重要数据。