About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
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Presentation Title |
Flexible Simulation Augmentation for DED AM Using In-situ Digital Image Correlation, Multispectral Infrared Imaging, and Neutron Scattering Validation |
Author(s) |
James C. Haley, Stephan DeWitt, Thomas Feldhausen, Bruno Turcksin |
On-Site Speaker (Planned) |
James C. Haley |
Abstract Scope |
In Directed Energy Deposition (DED), transient thermal fields induce scan strategy dependent residual stresses and distortion. Previously developed in-situ Digital Image Correlation (DIC) and infrared imaging techniques can directly measure dynamic strains and temperatures; however, such techniques are limited to the surfaces of deposited components. In this talk, we’ll explore how neutron scattering experiments and thermal simulations can augment these inexpensive, scalable imaging techniques. Neutron scattering can be used to validate the DIC-measured surface strains or to provide residual stress data inside the component. Component-scale thermal simulations can provide the thermal fields inside the component. Taking a data assimilation approach, we discuss the use of an ensemble Kalman filter to dynamically correct the simulation to be consistent with in-situ infrared imaging, allowing for a new degree of accuracy in understanding transient behavior in AM. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Characterization |