About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing for Energy Applications V
|
Presentation Title |
Effect of Precipitate Wettability on Nanoscale Oxide Precipitation of Additively Manufactured FeCrAl via In Situ Oxidation |
Author(s) |
Ty Austin, Steven Zinkle, Niyanth Sridharan |
On-Site Speaker (Planned) |
Ty Austin |
Abstract Scope |
Oxide dispersion strengthened (ODS) FeCrAl alloys combine the improved high-temperature corrosion resistance provided by Al additions with the improved mechanical properties and irradiation resistance provided by fine nanoscale precipitate dispersions. Directed energy deposition (DED) additive manufacturing (AM) providing oxygen during powder consolidation allows for potential increased geometric complexity, local microstructure control, and part throughput while avoiding the pitfalls often plaguing conventional mechanical alloying (MA) based ODS manufacturing of batch-to-batch variability, long lead times, low throughput, and anisotropic mechanical properties. In our previous work DED AM manufacturing of ODS FeCrAl was capable of significant oxygen retention (0.067 wt%) and precipitate number densities (~10<sup>22</sup> m<sup>-3</sup>) while maintaining acceptable part quality (part density > 99%). Unfortunately, significant amounts of oxide forming elements were wasted by precipitate agglomeration. This work examines the influence of Si, Ti, and O additions to improve oxide wettability and incorporation into the matrix of ODS FeCrAl produced using DED. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Nuclear Materials, Iron and Steel |