About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
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Presentation Title |
Characterization of Laser Powder Bed Fusion Internal and Surface Defects as a Foundation for In Situ Monitoring |
Author(s) |
Sean Dobson, Ashley Paz y Puente |
On-Site Speaker (Planned) |
Sean Dobson |
Abstract Scope |
Laser powder bed fusion (L-PBF) additive manufacturing is currently being used, at a limited capacity, as a means of small volume production. Concerns of part quality have led to hesitance in adopting L-PBF as a mainstream method of manufacturing. In-process monitoring has been identified as a tool that can be harnessed to ensure process stability. Although some in-process monitoring studies are examining surface characteristics, many only use it for maintaining recoater health. This on-going study aims to understand the connection between the top surface of L-PBF parts and their internal periodic and material defects. Laser scanning confocal microscopy is used to generate 3-D height maps and obtain high resolution surface profiles for establishing a ground truth of the sample surface. Robust 2-D and 3-D serial sectioning methods are used to characterize the internal defects. Uncovering this connection will lay the foundation for a novel laser scanning in-process monitoring system. |