About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Sacrificial Preform Design and Parameter Optimization for Thin Walls and Corners in Powder-Blown Hybrid DED |
Author(s) |
James David Wateska, Carolyn Conner Seepersad |
On-Site Speaker (Planned) |
James David Wateska |
Abstract Scope |
Producing sharp corners and thin-walled features in hybrid additive manufacturing (AM) is challenging due to rapid toolpath accelerations and low structural rigidity. These issues often cause bead irregularities and machining-induced deflections. This study investigates the use of process optimization and sacrificial preforms to enhance stability and consistency in powder-blown Directed Energy Deposition of 17-4 PH stainless steel. On the additive side, a design of experiments approach samples corner geometries with varying angles and layer counts. The resulting volumetric data trains a surrogate model to predict region-specific process parameters. On the subtractive side, cutting forces are measured using a mechanistic force model, and cutting coefficients are extracted to guide the design of sacrificial preforms. The proposed strategies are validated through finite element simulations and physical experiments. Results demonstrate improved volumetric uniformity and reduced surface location errors, confirming the effectiveness of integrating data-driven parameter optimization and force-informed preform design in hybrid AM. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |