About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Dynamic Materials Experiments at High Pressures and High Strain Rates on the National Ignition Facility Laser* |
Author(s) |
Bruce A. Remington |
On-Site Speaker (Planned) |
Bruce A. Remington |
Abstract Scope |
Experiments at the National Ignition Facility laser are probing matter at high pressures using ramped compression in various Discovery Science campaigns. The equation of state of iron has been measured to 1.4 TPa (14 Mbar) peak pressure and diamond up to 5 TPa using time resolved velocity interferometry. The phase of carbon has been measured to pressures of 2 TPa with x-ray diffraction, showing no phase transitions over the ~10 ns duration of the experiment. Magnesium has also been studied with diffraction to 1.3 TPa, showing multiple phase transitions. And 2D plastic flow studies of iron driven by the Rayleigh-Taylor instability to peak pressures and strain rates of ~400 GPa and ~1.e7 1/s suggest significant increases of strength at these extreme conditions. Examples from these experiments will be presented. *This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Magnesium, Phase Transformations |