About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Sub-surface Microtensile Testing in Oxidized Equiatomic Alloy NbTiCr |
Author(s) |
Robert Wheeler, Todd Butler, Marc Doran, Scott Apt, Melinda Ostendorf |
On-Site Speaker (Planned) |
Robert Wheeler |
Abstract Scope |
The oxidation of metals at elevated temperatures over time often leads to the development of complex subsurface microstructural changes. Near-surface layered structures can develop normal to the inward diffusion of oxygen and nitrogen acting in concert with the outward diffusion of metal species in complex metallic alloys such as NbTiCr. The conversion of microstructure near the metal/atmosphere interface leads to the formation of oxide scales at the outermost layers followed by internally oxidized layers with oxide and metal phase changes and, in turn, modified metallic layers resulting from composition changes driven by layer formation above. We have first fabricated microscale tensile specimens from within discrete layers below the surface of oxidized NbTiCr. We have then measured the tensile properties within each representative layer in order to understand the variation in overall behavior resulting from the dramatic local microstructural transformations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, High-Temperature Materials, Characterization |