About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Accuracy Assessment of Laser Powder Bed Fusion Fabricated AlSi10Mg Plate-Lattice Structures Using Micro-Computer Tomography |
| Author(s) |
Joseph Berthel, Jack Beuth, Rahul Panat |
| On-Site Speaker (Planned) |
Joseph Berthel |
| Abstract Scope |
Laser powder bed fusion is a frequently used manufacturing process for lattice structures because of its ability to fabricate complex geometries out of several metal alloys. However, process induced geometric errors can occur and are especially detrimental to lattice mechanical performance because size of lattice features approach printer resolution limits and mechanical performance is heavily linked to geometric accuracy. Plate-lattice structures in particular have unique fabrication challenges including fabrication of unsupported overhanging plates and the need for holes for residual powder drainage. In this study, AlSi10Mg plate-lattice structures are fabricated to determine the impact of processing parameters and scan strategy on geometric accuracy. Micro-computer tomography was used to reconstruct lattice unit cell models and determine surface roughness, plate thickness error, porosity, and overprinting defects. Results indicate fabrication quality tradeoffs between lattices fabricated with raster and single-bead scan strategies. |