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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Advanced Characterization Techniques for Quantifying and Modeling Deformation
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

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