|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A Low Cost, High-speed Optical Monitoring System for Tracking Spatter during Laser Powder Bed Fusion
||Christopher Barrett, Jason Walker, Rodrigo Enriquez Gutierrez, Eric MacDonald, Brett Conner
|On-Site Speaker (Planned)
In situ monitoring of laser processing during powder bed fusion of metals has primarily focused on evaluation of melt pool dynamics at a microscopic level. In this study, optical monitoring of laser powder bed fusion is conducted of the entire build bed with two high speed cameras operating in stereovision. The primary goal of the monitoring system is to identify and track spatter particles that are ejected from the melt pool during laser processing. Ejected spatter particles solidify in mid-flight before typically landing within the bounds of the powder bed, potentially within the cross-section of the previously fabricated layer. Such particles are unwanted as they can disrupt the formation of the next layer or cause inclusions in the fabricated part. Here, the effects of processing parameters on the formation of spatter (size and quantity) are studied, as well as the effects of scan strategy and airflow on directing spatter trajectory.
||Planned: Supplemental Proceedings volume