About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Role of Slip-Twin Interactions on the Nucleation and Stability of Deformation Twin Domains in Hexagonal Close-Packed Metals |
| Author(s) |
Darshan Bamney, Laurent Capolungo |
| On-Site Speaker (Planned) |
Darshan Bamney |
| Abstract Scope |
The nucleation and evolution of twin domains in hcp metals occurs concomitantly with slip. This work focuses on elucidating the role of slip on the formation/stability of twin embryos. First, a mesoscale spectral crystal plasticity-twinning framework is employed to quantify the change in the free energy landscape following the nucleation of tension twins in Mg. Representative twin morphologies are modeled under conditions which are emulative of small- and bulk-scale samples. Then, the driving traction profiles around twin embryos are utilized to determine their stability post nucleation. Profuse (or, bulk scale) slip activity in the parent grain is seen to significantly drive the formation of nanometric twin nuclei. Further, this scenario alters the overall stress state, such that the magnitude/polarity of the driving tractions become favorable for twin growth even at applied stresses as low as 100-250 MPa. This result is consistent with experimentally reported nucleation stresses in bulk polycrystalline specimens. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Phase Transformations |