|About this Abstract
||MS&T21: Materials Science & Technology
||Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
||Richtmyer-Meshkov Instability Testing and Accompanying Analysis: A Surface Sensitive Approach to High Strain Rate Testing of Irradiated Material without Bulk Volumes
||Calvin R. Lear, David R Jones, Daniel T Martinez, Jeremy R Payton, Michael B Prime, Saryu J Fensin
|On-Site Speaker (Planned)
||Calvin R. Lear
The inherent difficulties of handling bulk irradiated materials (expense, safety) are well known. While advances in sample preparation and small-scale mechanical testing now allow reduced volumes of these materials to be studied in otherwise low-hazard facilities, high strain rate mechanical testing (> 103/s) still requires large specimens (~1 cm3) and often destructive testing. Surface sensitive techniques thus offer an attractive alternative, requiring only that researchers modify a thin layer of the target to simulate the structure of the bulk irradiated material. Here, Richtmyer-Meshkov instability (RMI) experiments were carried out on bulk copper targets with helium implanted surface layers to study the effects of bubbles on material strength. The experimental process will be discussed at length, including the newly developed SAVER software package and comparison to hydrodynamics simulations, and the implications of differences between low and high strain rate mechanical properties of these samples will be explored.