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Meeting MS&T23: Materials Science & Technology
Symposium Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
Presentation Title Investigating the Effect of Part Geometry on Microstructure for Laser Powder Bed Fusion of Bismuth Telluride using In-Situ Process Monitoring
Author(s) Clayton Perbix, Nellie Pestian, Joe Walker, Saniya LeBlanc, Joy Gockel
On-Site Speaker (Planned) Clayton Perbix
Abstract Scope Bismuth Telluride (Bi<sub>2</sub>Te<sub>3</sub>) is a promising material for thermoelectric applications. However, little is currently known about the effect on microstructure and ultimately thermoelectric performance when the material is additively manufactured using laser powder bed fusion (PBF-LB). In this study, we investigate the effect of various build parameters and part geometries on the microstructure development of Bi<sub>2</sub>Te<sub>3</sub>. Additionally, in-situ process monitoring is performed using long-wavelength infrared imaging (LWIR) to provide localized temperature data to be correlated to input factors and resultant properties of a given part. Preliminary results suggest that PBF-LB Bi<sub>2</sub>Te<sub>3</sub> parts exhibit a large range of thermoelectric properties and microstructural features that are dependent on processing inputs. These findings also suggest that LWIR data can be used to infer the results of a given set of process inputs or build geometries, and that optimizing PBF-LB process parameters can lead to improved Bi<sub>2</sub>Te<sub>3</sub> thermoelectric performance.


An Efficiency Study of Multi-Mode Laser Profiles
Customized Glove Box for In Situ Monitoring of Laser Directed Energy Deposition
Exploring a Supervisory Control System Using ROS2 and IoT Sensors
Fill Impact Welding: Additive Manufacturing through Ballistic Impact of Metallic Sheets
Implementing Statistical Process Control in Laser Powder Bed Fusion Metal Additive Manufacturing
In-situ Pyrometric Sensing for Real-time AM Process Monitoring and Control
Investigating the Effect of Part Geometry on Microstructure for Laser Powder Bed Fusion of Bismuth Telluride using In-Situ Process Monitoring
Melt Pool Scale Process Monitoring for Laser Hot Wire Additive Directed Energy Deposition
Quantification of Build Interruptions through In-Process Monitoring and Mechanical Test
Real Time Observations of In-Situ Alloying Molybdenum and Ti-6Al-4V in Laser Directed Energy Deposition Additive Manufacturing
Reinforcement Learning for In-situ Melt Pool Control during Laser Powder Bed Fusion
Robust Detection of L-PBF Process Anomalies Using High-speed On-axis Melt Pool Pyrometry
Two-color Melt Pool Thermal Imaging on Powder-blown Laser-DED to Advance Understanding of Melt Pool Thermal-fluid Physics

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