| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
Grain Structure Formation During Additive Manufacturing
|
| Author(s) |
Alexander F. Chadwick, Juan Guillermo Santos Macías, Arash Samaei, Manas V. Upadhyay, Gregory Wagner, Peter W. Voorhees |
| On-Site Speaker (Planned) |
Peter W. Voorhees |
| Abstract Scope |
The morphology of grains produced during metal Additive Manufacturing (AM) can be very different from that given by conventional processing and is central to controlling the properties of the final build. A description of non-equilibrium interfaces is developed that is applicable to concentrated multicomponent alloys is used to show that during AM of 316L the solid-liquid interface is likely planar or has low amplitude cells. Using this insight, a phase field model is developed that follows the evolution of many thousands of grains in three dimensions. A comparison between the predicted grain shapes and those measured experimentally using an AM machine and a novel laser-SEM device (developed by the Upadhyay group at Ecole Polytechnique) will be given. The comparison shows the importance of weld pool shape, heat flow, and anisotropy of the interfacial mobility in the observed grain morphologies, and a good agreement between experiment and simulation. |
| Proceedings Inclusion? |
Planned: |