About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Comparison of Inert Gas Flow, Spatter Transport and Powder Pickup in Commercial and Open Format Laser Powder Bed Fusion Platforms |
| Author(s) |
Jashanpreet Saini, Nicholas O'Brien, Satbir Singh, Jack L Beuth |
| On-Site Speaker (Planned) |
Jack L Beuth |
| Abstract Scope |
Melt pool spatter is a source of porosity in Laser Powder Bed Fusion (LPBF). Inert gas flow is used to transport spatter from the build region, but gas flow designs vary significantly across machine platforms. This inhibits transfer of spatter control methods from lab-based open format platforms to commercial platforms used to build parts. This study develops and validates a CFD model of an Aconity MIDI build chamber using hot-wire anemometer measurements collected at multiple positions across the build plate. The validated flow field is then compared with previously published flow data for the EOS M290. Experiments of powder pickup across three materials identify a shear stress threshold below which powder will not be picked up by the inert gas flow. This threshold value is then applied across both AM platforms to set maximum flow rates. Spatter transport capabilities are then compared directly between the machines. |