About this Abstract |
Meeting |
2020 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
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Presentation Title |
Microstructure Development in Laser Powder Bed Fusion of Superalloys via Synchrotron Radiography and TriBeam Tomography |
Author(s) |
Andrew Polonsky, Kira Pusch, Toby Francis, McLean Echlin, Jonah Klemm-Toole, Alec Saville, Chandler Becker, Benjamin Ellyson, Yaofeng Guo, Chloe Johnson, Brian Milligan, Niranjan Parab, Kamel Fezzaa, Tao Sun, Amy Clarke, Tresa Pollock |
On-Site Speaker (Planned) |
Andrew Polonsky |
Abstract Scope |
Significant progress has been made in the development of advanced models that can capture the complexities of additive manufacturing processes. Advanced characterization techniques can offer insight to validate and expand these models to complex part geometries. Here we present the results of correlative studies combining both 3D microstructure characterization via TriBeam tomography with high speed radiography experiments to study the solidification process in superalloys at time and length scales relevant to additive manufacturing. Direct visualization of the solid liquid interface during solidification as well as details on the dynamics of the powder bed process will be discussed. Resulting microstructures from radiography experiments were fully characterized in 3D using Electron Backscatter Diffraction (EBSD), offering explicit measurement of grain morphology, texture, and the evolution of misorientation during solidification. The effects of base metal orientation in terms of theories developed for single crystal solidification will also be discussed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |