About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
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Process Development
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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 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. Here we study the plume fluctuations that occur 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 can be used to 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. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |