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 |
Implementation of Tool Shifts for 410 NiMo Overhang Structures in Wire-Arc Additive Manufacturing (WAAM) |
Author(s) |
Michael Sebok, Chris Masuo, Nathan Lambert, William Carter, Alex Walters, Andrzej Nycz, Riley Wallace |
On-Site Speaker (Planned) |
Michael Sebok |
Abstract Scope |
The wire-arc additive manufacturing (WAAM) process is highly sensitive to the spacing between deposited bead segments due to both the high thermal input of the process and inverted parabolic shape of beads. Perimeter beads deposited at high overhang angles with the same process parameters as a fully supported bead will fail due to gravitational effects. However, it is possible to modulate the bead spacing without adjusting other process settings to accurately deposit these overhang segments. This torch shift accounts for the gravitational effects on the melt pool in overhang segments so that the material will fill the desired geometrical bounds. In this work, a torch shift model is developed for printing overhangs in 410 NiMo Steel which improves surface finish of overhang segments across a selection of increasing overhang angles. Using this model, demonstration walls were printed with overhangs of ≥ 25 degrees without major degradation of the part geometry. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |