About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Modeling, Simulation and Artificial Intelligence
|
| Presentation Title |
F-28: Experimental‑CFD-Based Observation of Thermo‑Fluid Mechanisms in LPBF with Nanoparticle‑Coated Powders |
| Author(s) |
Meng-Hsiu Tsai |
| On-Site Speaker (Planned) |
Meng-Hsiu Tsai |
| Abstract Scope |
Nanoparticle‑coated powders have experimentally demonstrated improvements in LPBF surface roughness, yet the fluid–thermal mechanisms behind these effects remain insufficiently explored. In this work, experimental surface roughness and morphology data from TiO₂‑coated steel powder builds are combined with CFD simulations to observe how nanoparticles influence melt pool behavior. The CFD model visualizes key phenomena including Marangoni-driven convection, surface tension gradients, recoil pressure effects, wetting dynamics, and balling instabilities, under varying nanoparticle concentrations and laser energy settings. Simulation observations qualitatively correlate with experimental trends: nanoparticle addition enhances wetting, stabilizes capillary flows, suppresses balling, and leads to smoother surface morphology. Integrating CFD visualizations with experimental measurements provides mechanistic insight into how nanoparticle coatings modulate melt pool thermodynamics to enhance surface quality in LPBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Process Technology, Surface Modification and Coatings |