High-niobium titanium aluminide alloys

Details High-niobium titanium aluminide alloys High-niobium titanium aluminide alloys

1991-05-02

1992-02-18

Dean, R.

Alloys or metallic compositions

Titanium base

Aluminum containing

420580, 148407, 148419, 148421, 148442, C22C 1400

Patent

active

050892258

ABSTRACT:
A TiAl composition is prepared by ingot metallurgy to have higher strength and to have moderately reduced or improved ductility by altering the atomic ratio of the titanium and niobium to have what has been found to be a highly desirable effective aluminum concentration and by addition of niobium according to the approximate formula Ti.sub.48-37 Al.sub.46-49 Nb.sub.6-14.

REFERENCES:
patent: 3008823 (1961-11-01), McAndrew
patent: 4294615 (1981-10-01), Blackburn et al.
patent: 4661316 (1987-04-01), Hashimoto et al.
patent: 4788035 (1988-11-01), Gigliotti, Jr. et al.
Sastry, S. M. L. and Lipsitt, H. A., "Plastic Deformation of TiAl and Ti-3Al", Air Force Wright Aeronautical Labs., National Research Council, Titanium 80,2(1980) pp. 1231-1243.
Sastry, S. M. L. and Lipsitt, H. A., "Fatigue Deformation of TiAl Base Alloys", Metallurgical Transactions A, vol. 8A (Feb. 1977) pp. 299-308.
Blackburn, M. J., Ruckle, D. L., and Bevan C. E., "Research to Conduct an Exploratory Experimental and Analytical Investigation of Alloys", Technical Report AFML-TR-78-18 (Mar. 1978).
McAndrew, J. B. and Kessler, H. D., "Ti-36 Pct Al as a Base for High Temperature Alloys", Journal of Metals, Transactions AIME, vol. 206 (Oct. 1956) pp. 1348-1353.
Zelenkov, I. A. and Martynchuk, E. N., "Thermal Stability of Compounds of TiAl with Niobium at 800.degree. and 1000.degree. C.", Metallofizika, No. 42 (1971) pp. 63-66.
Zelenkov, I. A. and Martynchuk, E. N., "Heat Resistance of TiAl-Based Alloys at 100.degree. C.", Samoletostr. Tekh, Vozdush, Flota, 31 (1973) pp. 115-119.
Akad. Nauk, Ukrain. SSR, Metallofizikay, No. 50 (1974).

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