Titanium aluminide alloys
AssigneeGKSS-Forschungszentrum Geesthacht GmbH
InventorsFritz Appel, Jonathan Paul, Michael Oehring
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Abstract
Alloys based on titanium aluminides, such as γ (TiAl) which may be made through the use of casting or powder metallurgical processes and heat treatments. The alloys contain titanium, 38 to 46 atom % aluminum, and 5 to 10 atom % niobium, and they contain composite lamella structures with B19 phase and β phase there in a volume ratio of the B19 phase to β phase 0.05:1 and 20:1.
Claims28
An alloy comprising titanium, 38 to 46 at % aluminum, and 5 to 10 at % niobium, and comprising composite lamella that contain a B19 phase and a β phase in a volume ratio of B19:β of 0.05:1 to 20:1.
A method for the production of an alloy, comprising:
- providing a composition that comprises titanium, 38 to 46 at % aluminum, and 5 to 10 at % niobium;
- subjecting the composition to a casting or powder metallurgical technique to produce an intermediate product;
- and
- subjecting the intermediate product to a heat treatment, the heat treatment comprising heating the intermediate product at a temperature above 900° C. for more than sixty minutes, and cooling the intermediate product at a rate of more than 0.5° C. per minute.
Dependencies are inferred from the claim text.