|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Process Monitoring for Powder Bed Fusion of Metal Alloys Using High Speed Optical Diagnostics
||Manyalibo Matthews, Gabe Guss, Nicholas Calta, Sheldon Wu, Sonny Ly, Michael Crumb
|On-Site Speaker (Planned)
Irregularities in melt pool conditions during powder bed fusion (PBF) processing can lead to localized defects and poor part quality. Here we present high speed thermographic and profilometry measurements of melt pool evolution and layer-to-layer height variation during PBF processing. We also discuss the transient behavior related to the interaction between the melt pool, laser beam, and powder bed. We directly observe and quantify important process characteristics such as peak temperatures, temperature gradients, spatter ejection and melt pool oscillations. Our high speed acquisition allows detailed features in the final melt track morphology to be observed and associated with changes in thermal profiles. Along with providing process monitoring data to facilitate part certification, data provided by our diagnostics can help validate process models. The practical implementation of these high speed diagnostics into commercial platforms is also discussed.
||Planned: Supplemental Proceedings volume