| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dynamic Behavior of Materials X
|
| Presentation Title |
Laser Shock Compression of Diamond, Olivine, and Perovskite |
| Author(s) |
Boya Li, Alex Li, Shiteng Zhao, Marc Meyers |
| On-Site Speaker (Planned) |
Boya Li |
| Abstract Scope |
Laser shock compression subjects materials to an extreme regime of high quasi-hydrostatic pressure and high strain rates. When a shock wave passes through a crystalline solid, the material is compressed while plastic deformation takes place. In ductile materials, this process is operated by dislocations, twinning and phase transformations as the strain rate increases. Covalently bonded materials usually exhibit a higher Peierls-Nabarro stress, which makes dislocation activity difficult and triggers brittle fracture and amorphization in some cases. Shear from shock compression induces defects. The generation of defects as a deformation process releases the applied deviatoric stress. We analyzed the microstructures of shocked diamond, olivine, and perovskite. Molecular dynamics simulations are used to predict the defect evolution in these materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Other |