About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
3D Characterization of Microstructure Anisotropy along the Build Direction of PBF SB-CoNi-10 |
Author(s) |
James Lamb, Andrew Polonsky, Kira Pusch, Evan Raeker, Tresa Pollock |
On-Site Speaker (Planned) |
James Lamb |
Abstract Scope |
The expanded design space afforded by additive manufacturing (AM) for high temperature alloys used in the hot section of gas turbine engines has the potential to improve engine efficiency through higher operating temperatures and weight reduction. However, many nickel superalloys used in the hot section of turbine engines are prone to solidification cracking when exposed to the high thermal gradients and solidification velocities inherent to powder bed fusion AM . Here we present 3D characterizations of a CoNi-based superalloy with inherent oxidation resistance that shows low cracking susceptibility during PBF. Using kernel-based techniques including 3D geometrically necessary dislocation calculations, dislocation densities and misorientation accumulation along the build direction will be discussed, as well as their relation to cracks, voids, and other defects. Defect formation mechanisms and the spatial distribution of microstructural anisotropy in printed parts will be examined by leveraging multimodal 3D datasets (MURI and AUSMURI Collaborative Research). |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |