| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Non-equilibrium Molecular Dynamics Studies of Shock-induced Phase Transitions |
| Author(s) |
Ramon Ravelo |
| On-Site Speaker (Planned) |
Ramon Ravelo |
| Abstract Scope |
At high-strain rates of deformation --as those induced by strong shock waves, structural transformations can proceed at pressures above the thermodynamic phase transition boundary resulting in the loading of the parent phase into metastable states from which the phase change proceeds at rates which for single crystal metallic systems, might depend on original dislocation densities and crystal orientation. These anisotropies have been studied via large-scale non-equilibrium molecular dynamics (NEMD) simulations. We will examine the role of defect nucleation in the kinetics of shock-induced phase transitions in two different but related examples: the strain-rate dependence of the Hugoniot elastic limit in shock wave propagation in metallic single crystals and the role of plastic deformation in the kinetics of a fcc → bcc structural phase transition. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |