| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
|
| Presentation Title |
Disconnections and Other Defects Associated with Twin Interfaces |
| Author(s) |
Jian Wang |
| On-Site Speaker (Planned) |
Jian Wang |
| Abstract Scope |
Motion of the disconnections along the interface produces both the transformation deformation and the interface motion. Historically, grain boundaries have often been modelled as arrays of dislocations. In low-angle boundaries, the separation of individual dislocations is sufficient for regions of distorted single crystal to be discerned. Such regions can be regarded as naturally commensurate terraces. In the high-angle regime, the cores of the component dislocations overlap, and alternative descriptions of their structures are helpful. Thus, the structure of twin boundaries can be regarded as naturally coherent homo-epitaxial terraces. In this lecture, our objective is to concentrate on defects relevant to interface motion, and these exhibit dislocation, disclination, or step character, or some combination thereof. We take twinning in hcp metals as many defect examples. The definition of shuffles within the topological model and the concept of partitioning of the rotational component are presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Magnesium, Other |