About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Contributing Factors to High-Quality Ni-Mo-Al Single Crystal Repairs by Laser Melting: A Multimodal Approach |
Author(s) |
Adriana Eres-Castellanos, Ruben Ochoa, James Lamb, Christopher A. Hareland, Gus Becker, Bryan Lim, Kamel Fezzaa, Simon P. Ringer, Sophie Primig, Xiaozhou Liao, Tresa Pollock, Peter W. Voorhees, Amy Clarke |
On-Site Speaker (Planned) |
Adriana Eres-Castellanos |
Abstract Scope |
Single crystal Ni aerospace parts are subjected to rigorous regulations that demand part reparation, for which laser repair techniques have recently received attention. High-quality repairs imply the consideration of numerous physical processes, which cannot be unraveled solely by ex-situ techniques. Thus, highlighting the importance of combining in-situ and ex-situ characterization, with modeling. This work aims to addresses the relevance of processing parameters in laser melting repair quality. To do so, model Ni-Mo-Al single crystals with varying crystallographic orientations and solute (Mo, Al) contents were subjected to laser spot melting. In-situ synchrotron X-Ray imaging was performed and informed CFD and FE simulation software for thermal history and residual stress computations. Advanced characterization techniques, such as EBSD, TriBeam Tomography, and APT, were utilized. This multimodal approach allowed to obtain detailed information about the solidification process and the as-solidified microstructure, enabling the discussion on the contribution of different factors to repair quality. |