|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||F-2: Atom Probe Tomography Studies of Complex Oxide Formations in Oxide Dispersion Strengthened Steels
||Dallin Barton, Monica Kapoor, Florian Vogel, B. Chad Hornbuckle, Kris Darling, Gregory B Thompson
|On-Site Speaker (Planned)
A series of bulk nanostructured Fe-Ni-Zr and Fe-Ni-Y oxide dispersion strengthened (ODS) alloys were synthesized using high energy mechanical alloying and consolidated using high temperature equal channel angular extrusion. After which the alloys were subjected to heat treatments up to 1000 deg. C. The resultant microstructures were found to be composed of nano/ultrafine or micrometer-sized grains with larger intermetallic precipitates and small Zr or Y oxide clusters. Atom probe tomography revealed the oxide clusters to consist of a complex chemistry with a radially dependent concentration of the different metallic oxide species. As one moved within the oxide precipitate, the oxide continually enriched with ZrO or YO dependent on the material type. The formation of the oxide with the different metallic species is discussed in terms of the thermodynamic energies of formations.
||Planned: Supplemental Proceedings volume