| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational and Modeling Challenges in Metals and Alloys for Extreme Environments
|
| Presentation Title |
Modeling of Laser Interactions with BCC Metals Using a Hybrid Atomistic-continuum Approach |
| Author(s) |
Ching Chen, Avanish Mishra, Sergey Galitskiy, Avinash M. Dongare |
| On-Site Speaker (Planned) |
Ching Chen |
| Abstract Scope |
The modeling of interaction of metallic materials with lasers requires an accurate description of absorption of the laser energy by electrons, heat generation/transfer and the energy dissipation mechanisms that can result in ablation, spallation, melting and shock compression behavior. Such a capability is available through a hybrid method that combines the dynamics atoms modeling using classical molecular dynamics (MD) with a continuum two-temperature model (TTM) to incorporate the energy absorption by electrons and the heating of the lattice when a metal interacts with a laser. The MD-TTM framework is extended to Ta, Fe and Mo systems wherein the electronic-temperature-dependent electron heat capacities, electron thermal conductivities, and electron-phonon coupling factors are parameterized using first principles simulations. The talk will discuss the framework of the MD-TTM simulations, the parameterization of the TTM and the capabilities to model interaction of femtosecond lasers with microstructures of Ta, Fe and Mo systems will be demonstrated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Computational Materials Science & Engineering |