About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Presentation Title |
Multimodal In-Situ Monitoring of Laser-Based Directed Energy Deposition |
| Author(s) |
Peter Oluwaseun Shobowale, Oumaima Guissem, Lars Bachert, Amelie Schatull, Maik Schürmann, Jörg Seewig, Jan Aurich, Lennart Hinz, Markus Kästner |
| On-Site Speaker (Planned) |
Peter Oluwaseun Shobowale |
| Abstract Scope |
Laser-based Directed Energy Deposition (DED-LB) is an emerging additive manufacturing technology. However, part quality is still challenged by dimensional inaccuracy and defect formation. While previous studies have mainly focused on monitoring the melt pool, this study investigates the less-explored post-solidification cooling phase. To characterize components during this period, a multimodal sensing system combining long-wave infrared thermography and laser line triangulation was developed. Calibration of both sensors into a unified coordinate system enables the synchronized acquisition of surface topography, temperature distribution, and visible-spectrum imagery. A feasibility study involving nine AISI 316L stainless steel single-track deposits produced at laser powers ranging from 800 W to 1200 W examined the relationship between track geometry and thermal distributions during the cooling period. Initial results show that higher laser powers consistently cause elevated residual temperatures. Alongside spatial emissivity variations that appeared darker in the visible-spectrum imagery, an isolated thermal anomaly was observed, hinting at the system's potential to detect irregularities. |
| Proceedings Inclusion? |
Planned: Post-meeting proceedings |