强激光加载下金属材料微喷回收诊断

Study on metal ejection under laser shock loading

金属材料在冲击载荷下的动态响应在许多民用工程、航空航天等领域都有重要的应用背景.而金属材料在冲击载荷下的微喷形成过程,包括微射流、碎裂以及微层裂的物理过程的研究中尚存在许多空白.介绍了国内首次在神光Ⅲ原型激光装置上开展的金属材料微喷回收实验,实现了激光加载下低密度泡沫材料对微喷颗粒的回收,对回收样品进行了X光CT分析,通过图像重建,获得了回收微喷颗粒的三维图像,以及颗粒不同形态分布、颗粒尺寸、颗粒质量等定量结果.

Dynamic response of metal to shock loading plays an improtant role in the fields of civil engineering, aeronautics, etc. The forming process of ejection of metal under shock loading, including micro-jet, fragmentation and micro-spall remain to be studied. The present work is devoted to laser-shock experiments in metal ejection on the SGIII laser facility. And the fragment recovery and post-test evaluation of the fragment-size distribution are achieved.