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 |
Achieving Consistent Microstructure through Feedforward Temperature Control in Laser Powder Bed Fusion |
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 a critical step in advancing additive manufacturing, essential for achieving consistent microstructure and build quality. Heat accumulation can lead to part failure and irregular microstructure, emphasizing the need for precise temperature control. This study utilizes a layerwise thermal process simulation model to determine additional cooling time required to maintain a specified temperature. Leveraging a surrogate model, a true thickness layerwise model with powder is developed and used to determine the cooling time it takes the part to cool below the specified temperature. Calibration and validation are performed utilizing an infrared camera (IR) to capture the interpass temperatures. A recoater blade crash that occurred during the original build is rectified with feedforward temperature control. A large variation in hardness in the original build has been observed in the high heat accumulation areas compared to other regions; in contrast, the variation is significantly reduced with the feedforward control. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |