|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Droplet-Powder Interactions in Binder Jetting: From Droplet to Line to Layer to Part
||Nathan Crane, Trenton M Colton, Colton Inkley
|On-Site Speaker (Planned)
Binder jetting (BJ) defines part geometry by inkjet printing binder into a thin layer of loose powder. The interactions of the droplets with the powder influence the final quality of the parts. For example, powder rearrangement, balling, and bleeding can generate defects that remain in the final part. Yet, the complex interactions in the printing process remain relatively poorly understood. This work utilizes an open binder jetting platform to systematically compare the parameters that allow for successful formation of different geometries from lines to 3D parts in a fine 316 SS powder. The impact of printing on geometry formation, surface roughness, and effective saturation are reported. These results show that information from simple primitives fail to predict 3D part behavior. Optimization of printing parameters such as droplet/line spacing can improve surface quality, reduce defects, and optimize printing speeds.
||Additive Manufacturing, Powder Materials, Other