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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Equipment, Instrumentation and Measurement
Presentation Title Investigations on Optical Emissions and Their Relation to Processing Parameters and Processing Regimes in The Laser Powder Bed Fusion Process
Author(s) Christopher B. Stutzman, Abdalla R Nassar
On-Site Speaker (Planned) Christopher B. Stutzman
Abstract Scope Additive manufacturing (AM) is a rapidly growing field where complex components are produced without complex tooling. While the desire to move into new defect critical industries exists, it is important to understand that AM processes can, and often do, create flaws within the component. Therefore, it is important to monitor the process to determine when flaws are formed. In this work, we investigate the sensing of plume fluctuations during the deposition of nickel alloy 625 via a custom-built, off-axis multi-spectral sensor during a laser powder bed fusion process. We show that spectral emission lines from the vapor plume, relate to processing parameters used during deposition and enable sensor-based process map development. We conclude by proposing a novel calibration technique which will permit the correction of intensity variations thus enabling analysis on the fly. Expected applications of the work include real-time sensing and control of PBFAM build conditions.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New Preheating Method for Electron Beam Powder Bed Fusion, Opening a Wider Range of Processable Feedstocks
Adaptive Multi-Beam Laser Additive Manufacturing (AMB-LAM) Technology: Instrumentation and Processes Development and Demonstration
Analysis of In-Situ, 3D Surround Digital Image Correlation with Mapped Thermography in Directed Energy Deposition
Benefits of In-situ Monitoring in Metal Additive Manufacturing
Characterization of 3D-printed Metals with Ultrasonic Technique
Combining In-situ Monitoring and X-ray Computed Tomography to Assess the Quality of Parts Manufactured by Powder Bed Fusion
Dynamics of Laser-powder-metal Interactions in L-PBF Captured by High Speed Imaging
In-Process Quality Control and Optimization for Ceramic 3D Printing
Investigations on Optical Emissions and Their Relation to Processing Parameters and Processing Regimes in The Laser Powder Bed Fusion Process
Machine Learning Enabled Acoustic Monitoring for Flaw Type Detection in Laser Powder Bed Additive Manufacturing
Mechanical In-situ µCT Testing of Lattice Structures Manufactured by Selective Laser Melting
Optical Emission Sensing for Laser-based Additive Manufacturing – What Are We Actually Measuring?
Polyspectral Analysis for In-situ Prediction of Deviations in Laser Powder Bed Fusion Additive Manufacturing
Real Time Monitoring of Electron Emissions during Electron Beam Powder Bed Fusion and Process Control for Arbitrary Geometries and Toolpaths
Using In-situ Process Monitoring Data to Identify Defective Layers in TI-6AL-4V Additively Manufactured Porous Biomaterials

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