About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
Quantifying the α-Lath Size Effects in Titanium from Three-Dimensional Discrete Dislocation Dynamics Simulations |
| Author(s) |
Ruidong Mei, Jaafar El-Awady |
| On-Site Speaker (Planned) |
Ruidong Mei |
| Abstract Scope |
Plastic deformation in Ti alloys is governed by complex interactions between dislocations and grain boundaries, particularly within the α-phase. While crystal plasticity (CP) models are widely used to predict mechanical behavior in Ti-alloys, they often rely on phenomenological rules that depend on empirical fitting. In this work, we employ discrete dislocation dynamics (DDD) simulations to uncover the mechanistic basis of grain size-dependent slip activity in α-lath Ti. We systematically explore how grain boundary orientation, boundary resistance, and dislocation dynamics influence plastic deformation across varying grain sizes. By characterizing the dislocation microstructural evolution, we reveal how α-lath characteristics drive plasticity localization and deformation mechanisms in Ti. The insights gained from these mechanistic simulations provide a foundation for informing and calibrating higher-fidelity CP models, ultimately enabling more accurate predictions of plastic response in Ti alloys with complex microstructures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Computational Materials Science & Engineering, Modeling and Simulation |