About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Multi-modal In-situ Monitoring Data Analysis for Overhang Features Built with Laser Powder Bed Fusion |
Author(s) |
Ndeye Yande Yande Clarisse Ndiaye, Zhuo Yang, Simin Li, Jennifer Li, Yan Lu, Brandon Lane, Ho Yeung |
On-Site Speaker (Planned) |
Ndeye Yande Yande Clarisse Ndiaye |
Abstract Scope |
Part geometry in the powder bed fusion process decides the cross-section of layer slices which impact the mechanism of the support structure. The overhang down-skin surface receives support purely from powders showing poor geometric accuracy and surface roughness. This study collects in-situ coaxial melt pool and layerwise overview images to investigate the dimensional deviations in overhang regions based on a part designed with several overhang features. Statistical analysis within crossed layers and modalities is conducted to retrieve common features and find correlations between multi-modal observations. Both the layerwise pixel (LWP) index and melt pool monitoring (MPM) index strongly correlate to the overhang features of different gradients. The LWP index at the overhang down-skin region is noticeably higher than in the regular region, similar to the MPM index on microscale regional analysis. The results match the observations from XCT scan and provide a way to do fast anomaly detection in real-time. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |