About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2021
|
| Presentation Title |
Three Dimensional Interaction of {101 ̅2} Twins with Tilt Boundaries in Mg: Twin and Dislocation Transmission |
| Author(s) |
Khanh Dang, John Graham, Carlos Tome, Vincent Taupin, Laurent Capolungo |
| On-Site Speaker (Planned) |
Laurent Capolungo |
| Abstract Scope |
While both dislocations and deformation twins accommodate plastic shear in Mg, the former are line defects while the latter are three-dimensional domains bounded by numerous complex interfaces. As such, both kinetics and kinematics of twin transmission is more complex than that of dislocations. In this work, using atomistic simulations and phase field modeling, we study the reactions associated with the interactions between twins and tilt boundaries. We find that the byproduct of short-range interfacial interactions can either be a new twin or a dislocation, depending on the geometrical alignment of the slip and/or twinning systems, resolved shear stress, and interactions between intrinsic defects within the twins and grain boundaries. Originally, we find that lateral twin transmission is easier than forward twin transmission. Using phase field we systematically investigate the role played by facet energies and mobilities as well as internal stresses on lateral and forward transmission into neighboring grains. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, |