|About this Abstract
||MS&T21: Materials Science & Technology
||Additive Manufacturing of Metals: Equipment, Instrumentation and In-Situ Process Monitoring
||In-situ Sensing in Processing Parameter Development for Bismuth Telluride Bulk Part Fabrication Using Laser Powder Bed Fusion
||Kelly Rickert, Joy Gockel, Sabrina D'Alesandro, Saniya LeBlanc, Tanvi Banerjee, Alexander Groeger, Joe Walker, John Middendorf
|On-Site Speaker (Planned)
Laser powder bed fusion (LPBF) additive manufacturing (AM) is a promising manufacturing technique because it can create complex components in one process with minimal waste. This study investigates process parameter development for bismuth telluride, a functional material for solid-state thermoelectric energy conversion, using in-situ process monitoring with multiple sensors during the LPBF AM process. The influence of the processing parameters (laser power, laser speed and hatch spacing) is explored by performing basic experiments on a bismuth telluride substrate, including single bead laser tracks and single area laser scans. Multi-sensor in-situ process monitoring data is collected during the printing process and the sensor data is analyzed to determine relevant features that relate to the melt pool size and material characteristics such as porosity. The results of this work will connect in-situ sensor response to material characteristics and will inform process design methodologies to accelerate the development for AM of bismuth telluride.