| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
Mesoscale Modeling of Deformation and Failure Behavior of Metallic Ultrafine-grained Microstructures |
| Author(s) |
Avinash M. Dongare, Garvit Agarwal, Ke Ma |
| On-Site Speaker (Planned) |
Avinash M. Dongare |
| 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 heterogeneities such as grain size (ranging from 100 nm to 1 micron) on the mechanics of these materials during high rate compression and tension of Al, Al/Ni, and Fe microstructures. The framework of the QCGD simulations, the scaling relationships and the ability to reproduce MD-predicted evolution of microstructure (dislocations, phase transformation, voids, etc.) and temperatures will be presented. The applicability of the QCGD simulations to model the shock response of UFG microstructures and the capability to bridge the mesoscale gap between the current atomic-scale simulations and the continuum simulations will be presented. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |