In situ measurement of the particle size distribution of the fragmentation product of laser-shock-melted aluminum using in-line picosecond holography

Ying-Hua Li,Lin Zhang,Xiang-Ping Ye,Jie Zhong,Zu-Gen Zhang,Ling-Cang Cai,Yu Zhao,Xue-Mei Li

doi:10.1063/1.4942089

Abstract

The dynamic fragmentation of shock-melted metal is a topic of increasing interest in shock physics. However, high-quality experimental studies of the phenomenon are limited, and data that are essential for developing predictive models of the phenomenon, such as the mass and particle sizes distributions, are quite sparse. In-line holography is an effective non-contact technique for measuring particle size distribution, but critical technical requirements, in particular, particle density limits, complicate its application to the subject phenomenon. These challenges have been reasonably overcome in the present study, allowing for successful in situ measurements of the size distribution of the fragmentation product from laser-shock-melted aluminum. In this letter, we report on our experiments and present the measured data.

Highlights

In situ measurement of the particle size distribution of the fragmentation product of laser-shock-melted aluminum using inline picosecond holography
In-line holography is an effective non-contact technique for measuring particle size distribution, but critical technical requirements, in particular, particle density limits, complicate its application to the subject phenomenon. These challenges have been reasonably overcome in the present study, allowing for successful in situ measurements of the size distribution of the fragmentation product from laser-shock-melted aluminum
If the incident shock wave pulse has a triangular or Taylor shape profile, where the shock is followed by gradual unloading, tensile stress is immediately generated when the shock wave front reflects from the sample’s free surface, leading to successive fragmentation of the sample, which forms a cloud of solid debris and/or fine liquid droplets that are ejected from the free surface with high velocity

Summary

Introduction

In situ measurement of the particle size distribution of the fragmentation product of laser-shock-melted aluminum using inline picosecond holography. These challenges have been reasonably overcome in the present study, allowing for successful in situ measurements of the size distribution of the fragmentation product from laser-shock-melted aluminum.

Results

Conclusion