About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Physics-based Feedforward Control of Laser Powder Bed Fusion Process |
Author(s) |
Alexander R. Riensche, Benjamin Bevans, Ziyad Smoqi, Reza Yavari, Josie Gilligan, Ajay Krishnan, Kevin Cole, Prahalada Rao |
On-Site Speaker (Planned) |
Alexander R. Riensche |
Abstract Scope |
In this work we mitigated flaw formation in laser powder bed fusion (LPBF) additive manufacturing by introducing feedforward process control. In LPBF the spatiotemporal temperature distribution in the part during processing, called thermal history, is the root cause of flaw formation such as distortion, poor geometric integrity, microstructure heterogeneity, and degraded surface finish. The key idea is to use physics-based thermal simulation to optimally adjust the processing parameters layer-by-layer before the part is printed. The effectiveness of this smart additive manufacturing approach is demonstrated in the context of several LPBF parts (Inconel 718) built on two separate build plates. The results demonstrate that controlled processing improves surface finish, geometric inaccuracy, and resolution of fine features. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |