About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Feedforward Temperature Control in Laser Powder Bed Fusion to Reduce Build Failures and Achieve Consistent Microstructure |
Author(s) |
Shawn Hinnebusch, William Templeton, Praveen Vulimiri, Alaa Olleak, Florian Dugast, Sneha Narra, Albert To |
On-Site Speaker (Planned) |
Shawn Hinnebusch |
Abstract Scope |
Part qualification is crucial for advancing additive manufacturing, ensuring consistent microstructure and build quality. Excessive heat accumulation can cause significant distortion, recoater blade interference, irregular microstructure, and part discoloration, highlighting the need for precise temperature control. This study employs a thermal process simulation model to determine the additional cooling time required to remain below a specified temperature threshold. By leveraging a surrogate model, a true thickness layerwise model with powder is developed to determine the cooling time necessary for the part to cool below the specified temperature. Calibration and validation are conducted using an infrared (IR) camera to capture interpass temperatures. A recoater blade crash that occurred during the initial build is corrected with feedforward temperature control. The original build showed large hardness variation in high heat accumulation areas compared to other regions; in contrast, this variation is significantly reduced with the implementation of feedforward control. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |