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)
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| Presentation Title |
Resolving Enclosed Internal Structures in Laser Powder Bed Fusion |
| Author(s) |
Grayson Briles, Wisumitra Tirapanish, Alina Meunier, Harshith Adepu, Partha Pandit, Salil Bapat, Luz D. Sotelo |
| On-Site Speaker (Planned) |
Grayson Briles |
| Abstract Scope |
While Laser Powder Bed Fusion (LPBF) excels at fabricating complex geometries with high precision, issues with internal defects and geometries often arise. Past studies have assessed the effect of build orientation on circular geometries and open-ended channels. Still, less is known about the impact of enclosure and orientation on internal features. The objective of this study is to test whether the print orientation of LPBF parts impacts the ability to manufacture and resolve complex internal geometries. Two LPBF samples with hidden internal numbers were printed using different build orientations. Immersion ultrasound and X-ray CT data were collected to assess the fidelity of the internal geometry to the CAD models. Results show that features aligned with the build direction exhibited lower dimensional error, whereas curved features and downskin produced the highest inaccuracy. Overall, optimal orientation depends on aligning the critical internal features with the build direction to minimize the geometric error. |
| Proceedings Inclusion? |
Undecided |