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About this Abstract
Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Cooling Rate Measurement in Laser Directed Energy Deposition Using an Event-based Camera
Author(s) Ainsley Soleta, Aaron McMillen , Samantha Webster
On-Site Speaker (Planned) Ainsley Soleta
Abstract Scope Melt-pool behavior strongly influences microstructure and defect formation in laser powder-blown directed energy deposition (DED-LB). However, measuring melt-pool cooling rates in-situ remains difficult due to rapid solidification and noise while imaging. This work combines computational fluid dynamics, analytical heat transfer modeling, and in-situ sensing to estimate cooling rates during deposition. An infrared camera captures relative melt-pool temperature, while an event-based camera provides high-temporal resolution imaging of melt-pool behavior. Experimental data are coupled with numerical analysis to extract cooling rate trends and verify model predictions. Preliminary results demonstrate the feasibility of combining simulation and event-based imaging to characterize transient thermal behavior. Compared to traditional high-speed cameras, event-based imaging offers lower data throughput while still capturing rapid thermal changes, making it a more efficient option for in-situ monitoring. This approach establishes a framework for process monitoring, providing insight into the relationship between thermal history and resulting material properties in DED-LB systems.
Proceedings Inclusion? Undecided

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