| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Presentation Title |
Effect of Solidification Conditions on the Evolution of Dispersoids in a Ni-20Cr + 1 wt% Y2O3 ODS Alloy Fabricated with Laser Powder Bed Fusion |
| Author(s) |
Nathan A. Wassermann, Alan J. H. McGaughey, Sneha P. Narra |
| On-Site Speaker (Planned) |
Nathan A. Wassermann |
| Abstract Scope |
Oxide dispersion strengthened (ODS) alloys contain a high number density of nano-scale oxide dispersoids, offering exceptional high-temperature creep strength. Though these alloys offer a range of desirable properties, existing manufacturing methods are inconsistent, costly, and often yield anisotropic microstructures. While ODS alloys have been researched in the additive manufacturing (AM) literature, the evolution of nano-oxide dispersoids during AM processing is not well-understood. In this investigation, laser powder bed fusion (L-PBF) is used to fabricate samples of a Ni-20Cr + 1 wt% Y2O3 ODS alloy. A range of power-velocity combinations are applied, and differences in the evolution of nano-oxide dispersoids are evaluated across the processing space. Results from a heat transfer model are integrated with a model for inclusion growth, which is connected to the microstructure of the fabricated samples. The results of this investigation contribute to AM process design for ODS alloys. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |