About this Abstract |
Meeting |
2024 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 III
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Presentation Title |
Do Dislocation Structures Evolve during Metal 3D Printing After Solidification? – An In Situ Synchrotron X-ray Diffraction Study |
Author(s) |
Steve Gaudez, Kouider A Abdesselam, Hakim Gharbi, Zoltan Hegedues, Ulrich Lienert, Wolfgang Pantleon, Manas V Upadhyay |
On-Site Speaker (Planned) |
Wolfgang Pantleon |
Abstract Scope |
Dislocation structures are ubiquitous in any 3D printed alloy and play a primary role in determining the mechanical response of the printed part. While it is understood that these structures form due to rapid solidification during 3D printing, there was no consensus on whether they evolve due to subsequent solid-state thermal cycling that occurs with further addition of layers. In order to design alloy microstructures with desired mechanical responses, it is crucial to answer this outstanding question. To that end, a novel experiment has been conducted by employing high-resolution reciprocal space mapping, a synchrotron-based X-ray diffraction technique, in situ during 3D printing of an austenitic stainless steel by direct energy deposition. It reveals that dislocation structures formed during rapid solidification undergo significant evolution during subsequent solid-state thermal cycling, in particular during addition of the first few layers (up to 5 for this material and process) above the layer of interest. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Iron and Steel |