About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Role of Slip-Twin Interactions on the Evolution of Deformation Twinning Microstructures in Hexagonal Close-Packed Metals |
Author(s) |
Darshan Bamney, Andrea Rovinelli, Laurent Capolungo |
On-Site Speaker (Planned) |
Darshan Bamney |
Abstract Scope |
Deformation twinning plays a key role in modulating the mechanical properties of technologically important hcp metals/alloys. The evolution of twins (and consequently, the mechanical response) is conditioned by both the anisotropy in twin facet kinetics/energetics and slip-twin interactions. The present work focuses on elucidating the influence of these factors. To this end, first, an anisotropic multi-phase field model is coupled with a spectral elasto-viscoplastic formulation, which enables modeling the concomitant evolution of deformation twins and dislocation slip under mechanical loads in polycrystals. A model for the incorporation/transfer of dislocation densities between different phases is also implemented, allowing the effects of slip-twin interactions to be captured effectively. A parametric investigation of twinning behaviors in Mg single crystals and polycrystals reveals that the interplay between plasticity and anisotropy has a significant influence on stress relaxation behaviors, twin propagation/thickening kinetics, twin volume fraction evolution, and consequently, the overall morphology of the twin network. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Phase Transformations |