About this Abstract |
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. |