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Meeting MS&T21: Materials Science & Technology
Symposium Additive Manufacturing of Metals: Equipment, Instrumentation and In-Situ Process Monitoring
Presentation Title Combined In-situ Monitoring of Meltpool, Powder Layer, and Part Topography for Laser Powder Bed Fusion (LPBF) Based Metal Additive Manufacturing
Author(s) Xiayun Zhao
On-Site Speaker (Planned) Xiayun Zhao
Abstract Scope Comprehensive in-situ process monitoring is desired for metal additive manufacturing quality assurance and control, since it can provide critical insights of diverse process signatures and material behaviors. We have designed, developed, and deployed an in-house system for monitoring a commercial LPBF machine (EOS M290) to quantify ultrafast meltpool dynamics and layerwise powder bed and printed part surface topography. The synergistic in-situ monitoring approach has a great potential to diagnose online the process anomalies and part defects more thoroughly. In this talk, I will introduce the newly developed monitoring technology, which features a reinvented coaxial meltpool monitoring system in conjunction with an off-axis camera and an improved fringe projection based topography measurement method. Our cost-effective systems and LPBF-specific methods can be readily applicable to monitor other machines. I will also present our current experimental results and findings and conclude with a perspective of huge heterogeneous monitoring data analytics and computing.
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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