About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
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3rd World Congress on Artificial Intelligence in Materials & Manufacturing (AIM 2025)
|
Presentation Title |
Detection of Keyhole-Pore Formation in Laser Powder Bed Fusion Using Spatio-Temporal Graph Convolutional Networks |
Author(s) |
Kristen Jo Hernandez, Maliesha Sumudumalie, Tu Pham, Pawan Tripathi, Sanam Gorgannejad, Jean-Baptiste Forien, Maria Strantza, Gabriel Guss, Nicholas Calta, Brian Giera, Laura Bruckman, Aiden Martin |
On-Site Speaker (Planned) |
Kristen Jo Hernandez |
Abstract Scope |
Keyhole formation in laser powder bed fusion (L-PBF) is a dynamic process in which accurate modeling requires multiple assumptions and measurements. This inherent complexity results in inaccuracies from physics-based models and difficulty obtaining generalizable empirical models. To enhance detection in situ, low-resolution sensors are utilized alongside high-resolution imaging techniques to identify overlapping features. Accurate registration, detection, and classification of features are essential for correlating high-resolution features with low-resolution signals. Using high-speed synchrotron X-ray video imaging, we capture and extract vapor depression associated with keyhole defects, utilizing standard processing and feature extraction techniques that align with other detected signals. Extracted vapor depression geometries can be skeletonized into connected nodes with a particular set of overlapping feature components. We propose the implementation of a Spatio-Temporal Graph Convolutional Network (ST-GCN) to capture the correlations among evolving nodes in our features, thereby improving the efficiency and performance of vapor depression mapping to multisensor signals.
Prepared by LLNL under Contract DE-AC52-07NA27344. |
Proceedings Inclusion? |
Undecided |