Velocity of sound behind strong shock waves in 2024 A1
Rarefaction waves were produced by impacting a target with a thin plate. An optical technique was used to determine where the rarefaction from the back surface of the impactor overtook the shock wave induced in a step wedge target. Bromoform was placed on the front surface. When the shock reached the liquid it radiated steadily until the rarefaction from the impactor overtakes it. The times when this occurred were used to determine where the rarefaction just overtook the shock in the target, and thus the sound velocity. The leading edge of this rarefaction wave travels at longitudinal sound velocity in solids. This velocity increases smoothly with pressure until shock heating causes the material to melt. The data indicate that melting on the Hugoniot of 2024 Al begins at about 125 GPa and is completed at 150 GPa.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5962492
- Report Number(s):
- LA-UR-83-2269; CONF-830719-20; ON: DE83015927
- Resource Relation:
- Conference: American Physical Society meeting on shock waves in condensed media, Santa Fe, NM, USA, 18 Jul 1983
- Country of Publication:
- United States
- Language:
- English
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