About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Process-induced Microstructures and Defects
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Presentation Title |
Dispersoid Coarsening and Slag Formation during Melt-based Additive Manufacturing of ODS Superalloys |
Author(s) |
Zachary C. Cordero, Roger Hou |
On-Site Speaker (Planned) |
Zachary C. Cordero |
Abstract Scope |
The structural evolution behaviors of ODS superalloys during laser powder bed fusion have been assessed using physics-based process modeling and advanced structural characterization tools. Ni-Cr alloys with microalloying additions of Al and Y2O3 nanoparticles were densified using laser powder bed fusion in a parameter study where power, scanning speed, and spot size were independently varied. The resulting dispersoid size distribution were characterized using small angle neutron scattering and STEM measurements. Finally, these experimental results were used to validate process models of dispersoid coarsening and slag formation, which together suggest combinations of processing parameters and alloy chemistries which can fully densify the powder feedstock while suppressing deleterious phase formation. |
Proceedings Inclusion? |
Planned: |