| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2024
|
| Presentation Title |
Energetic Terms Associated with Twin Nucleation in Magnesium |
| Author(s) |
Enver Kapan, Sertan Alkan, C. Can Aydiner, Jeremy K. Mason |
| On-Site Speaker (Planned) |
Jeremy K. Mason |
| Abstract Scope |
Molecular dynamics simulations are performed that follow the energetic evolution of {1012} tension twin embryos nucleating from an asymmetrically-tilted grain boundary to investigate the energetics of twin nucleation. The line, surface and volumetric terms associated with twin nucleation are identified. A micromechanical model is proposed where the stress field around the twin nucleus is estimated using the Eshelby formalism, and the contributions of the various twin-related structures to the total energy of the twin are evaluated. The reduction in the grain boundary energy arising from the change in character of the prior grain boundary is found to offset the energy costs of the other interfaces. The defect structures bounding the stacking faults that form inside the twin are also found to possibly have significant energetic contributions. These results suggest that both of these effects could be critical considerations when predicting twin nucleation sites in magnesium. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Magnesium, Mechanical Properties |