Tri-titanium aluminide alloys having improved combination of str

Details Tri-titanium aluminide alloys having improved combination of str Tri-titanium aluminide alloys having improved combination of str

1992-06-29

1994-01-25

Roy, Upendra

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148421, 148671, 420418, C22C 1400

Patent

active

052812855

ABSTRACT:
Tri-titanium aluminide alloys are preferably deformed and heat treated below the beta transus temperature of the alloys to produce an improved combination of mechanical properties, specifically elevated temperature yield strength and creep resistance, and room temperature ductility and toughness. A preferred composition consists essentially of, in atomic percent, 24.5% aluminum, 12.5% niobium, 1.5% molybdenum, balance titanium.

REFERENCES:
patent: 2880087 (1959-03-01), Jaffee et al.
patent: 4292077 (1981-09-01), Blackburn et al.
patent: 4716020 (1987-12-01), Blackburn et al.
patent: 4788035 (1988-11-01), Gigliott, Jr. et al.
patent: 5032357 (1991-07-01), Rowe
Sixth World Conference on Titanium, Jun. 6-9, 1988, "Proceedings-Part II", by P. Lacombe, R. Tricot and G. Beranger, p. 1103, "Fracture Mechanisms in Titanium Aluminide Intermetallics".
Intermetallic Phases--Materials Developments and Prospects, by Gerhard Sauthoff, p. 337.

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