About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Wire-Arc DED of Porous Rafts for Self-Releasing Parts: Impact on Thermal History and Material Properties |
Author(s) |
Bemnet Molla, Tadeusz Kosmal, Christopher Williams |
On-Site Speaker (Planned) |
Bemnet Molla |
Abstract Scope |
Wire-Arc Directed Energy Deposition (DED-Arc) is an additive manufacturing process which yields fully dense metal parts that are strongly adhered to the build plate to prevent delamination. This work explores processing techniques intentionally inducing porous depositions for a sacrificial raft structure between the build plate and part, offering sufficient adhesion to the build plate while also enabling easy part removal. To explore the effect of the porous network on process heat flux and final part properties, measurements of part hardness and tensile strength, and in-situ data from infrared cameras and embedded thermocouples are analyzed. Measurements are compared from (1) traditional build strategies featuring fully dense depositions strongly adhered to the build plate and (2) fully dense depositions subsequently placed on a deposited porous raft. This work aims to unlock new avenues for advancing the capabilities of DED-Arc technology by tailoring heat dissipation mechanisms and reducing infrastructure required for part removal. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |