| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid-State Interfaces: Toward an Atomistic-Scale Understanding of Structure, Properties, and Behavior through Theory and Experiment
|
| Presentation Title |
The Behavior of Σ 11, <110> {252}{414} Grain Boundary in Aluminum Under Shock Loading by Molecular Dynamics Simulations |
| Author(s) |
Chiara Pozzi, Timothy C. Germann, Donato Firrao, Richard G. Hoagland |
| On-Site Speaker (Planned) |
Donato Firrao |
| Abstract Scope |
Metastable configurations can be obtained for the Σ 11<110>{252}{414} asymmetric grain boundary (GB) in aluminum by varying the reciprocal positions of the two grains before relaxing the initial structure. Molecular Dynamics (MD) simulations were performed in order to study the behavior of some of these GB configurations under shock loading. For different shock strengths and EAM potentials, observed plastic deformation modes include the emission of perfect and partial dislocations from the GB and, in some cases, the formation of nanotwins. These features and their nucleation mechanisms, as related to the shock strength and direction, the GB arrangement, the size of the model, and the material properties (via comparison of different EAM potentials) will be discussed on the basis of our MD simulation results. |
| Proceedings Inclusion? |
Definite: A CD-only volume |