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)
|
| Presentation Title |
Deformation Reduction in Laser Directed Energy Deposition Via a Controlled Secondary Heat Source |
| Author(s) |
Conor Savage, Tao Liu, Chinedum Okwudire |
| On-Site Speaker (Planned) |
Conor Savage |
| Abstract Scope |
Powder-blown Laser Directed Energy Deposition (LDED) is prone to part deformation due to steep thermal gradients and non-uniform cooling. Variations in a part’s thermal history strongly affect final distortion. In this work, we propose a physics-based, feedforward deformation control framework that informs a secondary heat source to modify a part’s thermal history. A thermal finite difference model is one-way coupled with a linear elastic formulation to capture elastic displacement response. This approach enables rapid evaluation of secondary heating strategies without computationally expensive multi-physics simulations. The proposed framework is experimentally validated using a dual-robot LDED system, where an induction heater mounted on a secondary robotic arm locally modifies the thermal field during deposition. The induction heater offers lower cost and larger thermal impact areas. Test depositions are fabricated and deformation quantified using pre- and post-process 3D laser scanning. Results demonstrate that model-informed secondary heating reduces deformation in LDED builds. |
| Proceedings Inclusion? |
Undecided |