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)
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| Presentation Title |
Beyond the Solid Raft: Geometric Strategies to Prevent Build Plate Bowing in CuCrZr L-PBF
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| Author(s) |
Andrei Alexandru Popa, Andrew Seltzman, Sebastian Leon Lasowy, Erick Liang, Fatma Nur Depboylu |
| On-Site Speaker (Planned) |
Andrei Alexandru Popa |
| Abstract Scope |
Build plate bowing in Laser Powder Bed Fusion (L-PBF) presents a major challenge when printing copper and its alloys, due to their high reflectivity and thermal conductivity. These conditions often cause dimensional inaccuracies and degrade structural properties—especially in large, monolithic parts for fusion applications. Fully solid rafts are commonly used to mitigate distortion, but are inefficient for large components. Standard support structures, conversely, often lead to warping, out-of-plane growth, and poor downskin quality. This study builds on prior resin-based research that showed patterned raft geometries can reduce out-of-plane deformation while maintaining support. Here, we investigate two patterned raft designs, each in two size configurations, for L-PBF CuCrZr printing. Results show that small geometric changes significantly affect print quality. Combined with variations in recoating time, unexpected improvements in upskin quality were also observed. These findings suggest that optimized raft patterning offers a promising, material-efficient strategy for large CuCrZr L-PBF. |
| Proceedings Inclusion? |
Planned: Post-meeting proceedings |