| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational and Modeling Challenges in Metals and Alloys for Extreme Environments
|
| Presentation Title |
Mesoscale Modeling of Deformation Behavior of Fe-based Microstructures at High Strain Rates and under Shock Loading Conditions |
| Author(s) |
Ke Ma, Avinash M. Dongare |
| On-Site Speaker (Planned) |
Ke Ma |
| Abstract Scope |
A novel mesoscale modeling method called quasi-coarse-grained dynamics (QCGD) is used to model the deformation behavior of polycrystalline and deformation-processed ultrafine-grained (UFG) iron microstructures. The QCGD simulations extend the capability of molecular dynamics simulations to the mesoscales by reducing the number of atoms being modeled in an atomic scale microstructure using representative atoms and scaled interatomic potentials. QCGD simulations are carried out to investigate the role of microstructure (with a grain size of up to a few microns) and pre-existing distributions of heterogeneities (dislocations, voids) to mimic deformation processed microstructures on the mesoscale mechanics of these materials during high rate compression and tension. The framework and capabilities of the QCGD simulations, the microstructural evolution (deformation twinning and phase transformation behavior) during high rate deformation behavior of Fe microstructures will be presented. The role of loading conditions and heterogeneities on thresholds for twinning/de-twinning and phase transformation behavior will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Phase Transformations |