About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Rapid solidification microstructures and crystal defects: insights from multiscale simulations and experimentation |
| Author(s) |
Tatu Pinomaa, Joni Kaipainen, Sam Nittala, Jaarli Suviranta, Adriana Eres-Castellanos, Pascal Thome, Amy J. Clarke, Joseph T. McKeown, Nikolas Provatas, Thomas Voisin, Anssi Laukkanen |
| On-Site Speaker (Planned) |
Tatu Pinomaa |
| Abstract Scope |
Rapid solidification (RS) generates unique nano-microstructures containing trapped lattice point defects, dense microsegregation, dislocation patterns, and microresidual stresses. These features can enhance corrosion resistance and strength-ductility combination, yet may also result in undesired phases, embrittlement, microcracking, and property variability.
Using atomistic and microstructural simulations, we elucidate connections between RS features and the energetic, kinetic, and morphological properties of solid-liquid interfaces. Molecular dynamics simulations capture RS-induced point defect trapping, and provide essential interfacial parameters for phase-field modeling. Phase-field simulations predict solidification morphologies, microsegregation, and grain growth competition; via coupling to thermomechanical crystal plasticity method, we describe the formation of dislocation structures and microresidual stresses. Mechanisms of dislocation patterning and orientation gradients are further explored using phase field crystal methods. Our simulations are validated by in-situ RS monitoring via dynamic transmission electron microscopy and characterization of post-solidification microstructures. The presented framework guides alloy design and processing strategies to optimize RS material properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Solidification, Characterization |