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US 5,846,345 AGranted
Intermetallic alloy based on titanium aluminide for casting
AssigneeOffice National d'Etudes et de Recherches Aerospatiales
InventorsShigehisa Naka, Marc Thomas, Agnes Bachelier-Locq, Tasadduq Khan
Life of this patent
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Abstract
In an alloy having a Ti/Al ratio close to 52/48, good castability, by virtue of initial solidification in the .beta. phase, together with a sufficiently low density and a good oxidation resistance are obtained by introducing approximately 2 atom. % of rhenium and/or tungsten. These alloys can be used especially for the production of aeronautical turbomachine components.
Claims8
An intermetallic alloy based on titanium aluminide for the production of castings, wherein the alloy's atomic composition lies within the range as follows:
- Ti:
- 48.5 to 52.5%
- Al:
- 45.5 to 48.5%
- Re:
- 0.5 to 2.5%
- W:
- 0 to 2.0%
- Re+W:
- 2.0 to 2.5%
- Nb:
- 0 to 3.5%
- Re+W+Nb:
- 2.0 to 5.5%
- Si:
- 0 to 1.0%.
13 more elements
Dependencies are inferred from the claim text.