Shock compression and unloading response of 1050 aluminum to 70 GPA

Abstract

Using laser-interferometry, shock compression and unloading profiles were measured in 1050 aluminum shocked to ~70 GPa. These results were compared to published data on relatively pure (99.99wt% ultra pure, 1050, 1060, and 1100) and precipitate - hardened (2024, 6061) aluminum. Within experimental scatter, Hugoniots and longitudinal sound speeds (in the shocked state) of pure and precipitate-hardened aluminum are quite comparable to 70GPa. This agreement demonstrates that impurity content has minimal influence on the longitudinal stress-volume response and acoustic speeds under shock compression.