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Meeting MS&T21: Materials Science & Technology
Symposium Additive Manufacturing of Metals: Equipment, Instrumentation and In-Situ Process Monitoring
Presentation Title Advancing Measurement Science of Laser Powder Bed Fusion (LPBF) Process Monitoring Applying Thermal Imaging
Author(s) Guadalupe Quirarte, Syed Zia Uddin
On-Site Speaker (Planned) Guadalupe Quirarte
Abstract Scope Accurate measurement of melt-pool temperature in the laser powder bed fusion (LPBF) process would result in an enhanced process control and qualification and in high-fidelity data for process modelling input and machine learning. Both the high speed associated with the laser and the change of phases and morphology during LPBF processing make it a challenging task to experimentally measure the melt-pool temperature using conventional infrared imaging or pyrometry. We are focused on developing real-time thermal imaging of AM tool melt-pool and surroundings leveraging the principle of dual wavelength pyrometry. Data is acquired using a high-speed camera operating at a shutter speed range of 30-40 microseconds and 6400 frames per second. Unique challenges associated with the methodology and corresponding calibration efforts were also outlined. Finally, the results presented would show the melt-pool temperature fields and shapes for different commonly used LPBF materials such as Ti-6Al-4V and 316L-SS.
Proceedings Inclusion? Undecided


Advancing Measurement Science of Laser Powder Bed Fusion (LPBF) Process Monitoring Applying Thermal Imaging
Combined In-situ Monitoring of Meltpool, Powder Layer, and Part Topography for Laser Powder Bed Fusion (LPBF) Based Metal Additive Manufacturing
Defect Recognition and Improvement in Ti-6Al-4V Fabrication by In-situ Monitoring and Feedback System of Directed Energy Deposition LAMDA 200
Functionally Graded Material Development by Leveraging Ultrasonic Grain Refinement in Additive Manufactured Nickel 718
High-speed Observations and Quantification of Spatter in Laser Powder Bed Fusion
In-situ Sensing in Processing Parameter Development for Bismuth Telluride Bulk Part Fabrication Using Laser Powder Bed Fusion
Innovative and Practical Approaches to Laser Powder Bed Fusion Sensing and Process Enhancement
Laser Powder Bed Fusion of Tall Thin Walled Structures: Dimensional Inaccuracy Due to Local Buckling, and In Situ Infrared Imaging for Early Failure Detection
Materials Characterization of Anomalies Identified Through In-situ Process Monitoring Data Analytics
Melt Pool Level Flaw Detection in Laser Hot Wire Additive Manufacturing Using a Trained Convolutional Long Short Term Memory Autoencoder
Physics Guided Machine Learning DED Melt Pool Width Prediction
Plenoptic Imaging for In-situ PIV and Melt Pool Monitoring in Laser Directed Energy Deposition
Studying the Effect of Inert Gases on Thermal Behavior in Laser Powder Bed Fusion Using In Situ Monitoring and Similarity Analysis
Ultrasonics for Monitoring Melt Pool Dynamics and Solidification

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