The influence of cooling rate during alloy casting on the oxidation behaviour of TiAl-based intermetallics

The oxidation behaviour of the intermetallic phase Ti--50 at.% Al at 900 deg C was studied. It was found that the oxidation behaviour strongly depends on the composition and distribution of the gamma and alpha sub 2 -phases in the alloy microstructure. As this microstructure strongly depends on the...

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Bibliographic Details
Published in:Journal of materials science 1993-11, Vol.28 (21), p.5869-5874
Main Authors: GIL, A, WALLURA, E, GRÜBMEIER, H, QUADAKKERS, W. J
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion mechanisms
Exact sciences and technology
Metals. Metallurgy
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Summary:The oxidation behaviour of the intermetallic phase Ti--50 at.% Al at 900 deg C was studied. It was found that the oxidation behaviour strongly depends on the composition and distribution of the gamma and alpha sub 2 -phases in the alloy microstructure. As this microstructure strongly depends on the alloy cooling rate, the oxidation behaviour of TiAl-based intermetallics is significantly affected by the casting procedure and subsequent heat treatment. Rapid cooling from high temperature (T = > 1400 deg C) has a beneficial effect on oxidation behaviour.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00365194