About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
Effect of Intercritical Annealing Temperature and Sb Micro-addition on the Selective Oxidation of a Fe-6wt.%Mn Alloy |
Author(s) |
Bita Pourbahari, Joseph R. McDermid |
On-Site Speaker (Planned) |
Bita Pourbahari |
Abstract Scope |
The effects of annealing parameters and a Sb micro-addition on oxide morphology and selective oxidation kinetics of a Fe-6 wt.% Mn alloy were determined. Increasing the annealing temperature led to coarsening of the surface oxides. Moreover, holding for a longer time at the annealing temperatures resulted in a decrease in bare area or the increase of oxide-covered surface and growth of the oxides. Adding Sb changed the morphology of the oxides from continuous to a granular and lensed shape morphologies, which was attributed to the Sb segregation to the surface during annealing and a decrease in the surface energy. Cross-sectional FIB analysis showed that the Sb addition resulted in a significant reduction of the internal oxidation zone and thickness of the external oxides, which was due to Sb segregation to the external oxide/substrate and internal oxide/substrate interfaces, thereby reducing the inward diffusion of oxygen and outward diffusion of Mn. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, |