Tri-titanium aluminide base alloys of improved strength and ductility
AssigneeGeneral Electric Company
InventorsMichael F. X. Gigliotti, Jr., Brian J. Marquardt
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Abstract
A titanium aluminide base composition is provided which has increased tensile strength, ductility and rupture life due to the addition of tantalum coupled with optional additions of vanadium and columbium.
Claims3
A composition having a titanium aluminide base and having good tensile strengths and ductilities and high creep resistance which comprises a composition containing a matrix phase based on Ti.sub.3 Al and containing additions of vanadium, columbium and tantalum wherein the additions are in the following proportions:
- (a) no less than about 2 atomic % tantalum;
- (b) no more than about 5 atomic % of either vanadium or columbium;
- (c) the sum of atomic % tantalum, columbium and vanadium exceeding 5%.
A titanium aluminide composition containing 20-26 atomic % aluminum, 6 to 7.5 atomic % tantalum, 2.5 to 4 atomic percent columbium and 0 to 1.5 atomic % vanadium and the balance titanium.
Dependencies are inferred from the claim text.