About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VI
|
Presentation Title |
The Complexity of Deformation Twinning |
Author(s) |
Huseyin Sehitoglu, Sameer Mohammed, Gorkem Gengor, Orcun Celebi |
On-Site Speaker (Planned) |
Huseyin Sehitoglu |
Abstract Scope |
Our understanding of deformation twinning relies on fcc metallic materials where the boundaries are classified as compound type. However, in bcc and hcp crystals and lower symmetry crystals the twinning motion is rather complex and requires understanding of atomic motion (shears, shuffles and offsets) that require atomic simulations. Furthermore, the presence of external stress could cause deviations from the twin plane determination relying on classical twinning theory. In this presentation, we will start with the reflective twins observed in fcc, then transition to bcc crystals and then cover hcp and monoclinic crystals. In many cases, combined MD and DFT calculations are needed in conjunction with anisotropic elasticity and topological model to gain insight into twin nucleation and twin variant motion. It is through combination of these tools in conjunction with high resolution experimental measurements that one can develop a better scientific understanding. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Mechanical Properties, Phase Transformations |