About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
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| Presentation Title |
Microstructure development during laser melting and resolidification: An experimentally validated simulation study |
| Author(s) |
Alexander F. Chadwick, Juan Guillermo Santos Macías, Arash Samaei, Gregory J. Wagner, Manas V. Upadhyay, Peter W. Voorhees |
| On-Site Speaker (Planned) |
Manas V. Upadhyay |
| Abstract Scope |
Understanding microstructure evolution during additive manufacturing requires synergy between in situ experiments and predictive simulations. This talk presents a combined experimental-modeling study of grain structure formation during solidification in 316L stainless steel under single-pass laser scans, mimicking bead-on-plate tracks. Laser scanning was conducted using a novel coupling between a continuous-wave laser and a scanning electron microscope, enabling direct observation of microstructural evolution. The laser scanning parameters and grain morphology and texture statistics from the initial microstructure served as input for coupled phase-field and thermal multiphysics simulations. The simulated microstructures show strong agreement with experimental observations across multiple laser powers and scan velocities, validating the model. Quantitative comparisons between simulated and measured top-surface morphologies highlight key dependencies of grain shape on processing parameters. Specifically, simulation results reveal that the major axis length of resolidified grains is sensitive to laser power and scan speed, while the minor axis remains relatively unaffected. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Solidification, Characterization |