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A high throughput investigation of Al and Cr additions to the Ti-Fe system via diffusion couple technique, and the oxidation characteristics of a microstructural gradient
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DOI：10.1016/j.corsci.2024.112604.png)
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Abstract
En 中文
A diffusion couple of Ti-Fe-Al to Ti-Fe-Cr alloys was assembled to rapidly assess the effects of Al and Cr additions to the Ti-Fe binary system. The entire Ti-Fe-Al-Cr compositional and microstructural gradient was oxidised at 650 degrees C for various time periods. Multi-layered scales formed across the entire gradient, dominated by rutile-TiO2, but also containing discontinuous alumina-Al2O3 and hematite-Fe2O3. A composition Ti-16Fe-4.5Al-5.8Cr (at%) corresponding to the bcc-B2 target microstructure was determined, and the stability of these oxides was evaluated through a standard thermodynamic methodology. The calculations suggest that secondary oxides do not form at the alloy/TiO2 interface.
Keywords:
Titanium
Intermetallics
Oxidation
EPMA
Raman spectroscopy
Thermodynamic diagrams
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