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Oxidation behaviour and related microstructural changes of two β0–phase containing TiAl alloys between 600 °C and 900 °C

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Watermeyer,  Philipp
Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Liebscher,  Christian
Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Mengis, L., Ulrich, A. S., Watermeyer, P., Liebscher, C., & Galetz, M. C. (2021). Oxidation behaviour and related microstructural changes of two β0–phase containing TiAl alloys between 600 °C and 900 °C. Corrosion Science, 178: 109085. doi:10.1016/j.corsci.2020.109085.


Cite as: https://hdl.handle.net/21.11116/0000-0009-3E9C-3
Abstract
A comparative study on the isothermal oxidation behaviour of the two β0–containing titanium aluminide alloys GE 4822 and TNM-B1 in the HIPed condition has been conducted at temperatures between 600 °C and 900 °C for up to 1000 h in air. The two alloys exhibit clear differences in their oxidation behaviour, however, both suffer from undesirable embrittlement due to oxidation after exposure for 100 h even at 600 °C. Phase transformations in the subsurface zone were shown to have a strong impact on the mechanical properties at room temperature.