About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
In-situ Analysis of Powder Bed Quality during Selective Laser Melting |
Author(s) |
Tan-Phuc Le, Matteo Seita |
On-Site Speaker (Planned) |
Tan-Phuc Le |
Abstract Scope |
The powder bed quality—including layer thickness uniformity and powder packing density—has a direct effect on the performance and consistency of parts produced via powder bed fusion (PBF) processes. However, in-situ monitoring of these quantities is challenging because it requires assessing the 3-D configuration of powder particles across the entire powder bed. In this work, we employ a “powder bed scanner” technique to capture particle-level resolution images of the entire powder bed surface during the re-coating process, which we analyze to infer 3-D information. Using this technique, we map variations in layer thickness and particle density as a function of powder conditions (e.g. virgin or recycled) and re-coating velocity during selective laser melting of stainless steel 316L specimens. We correlate this site-specific information with the material’s mechanical properties and propose strategies to optimize part performance depending on powder conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, |