About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Physical Modeling
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Presentation Title |
Thermomechanical and Geometry Model for Directed Energy Deposition with 2D/3D Toolpaths |
Author(s) |
Deniz Sera Ertay, Mihaela Vlasea, Kaan Erkorkmaz |
On-Site Speaker (Planned) |
Deniz Sera Ertay |
Abstract Scope |
Directed energy deposition (DED) is a metal additive manufacturing (AM) technology, where achieving tight dimensional tolerances is more challenging compared to conventional manufacturing processes. Process modeling and monitoring are common approaches to improve process accuracy and repeatability. So far, analytical modeling efforts have been limited to simple scan paths in literature. In this study, a voxel-based modeling approach is presented, capable of simulating a complex deposition path and predict the melt pool temperature, thermal history, and deposition geometry. A dual-wavelength pyrometer is used coaxially with the laser beam to validate the melt pool temperature predictions by sampling the calibrated intensity field in the melt pool and the actual position along the deposition path. Two different sets of processing parameters are used in the experiments to validate the model predictions, along complex beam paths. The differences in measured and predicted melt pool temperature and deposition geometry are observed. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |