Process of forming niobium and boron containing titanium alumini

Details Process of forming niobium and boron containing titanium alumini Process of forming niobium and boron containing titanium alumini

1990-09-26

1992-01-21

Roy, Upendra

Metal treatment

Compositions

Heat treating

148133, 148421, 420418, 420419, 420421, C22C 1400

Patent

active

050825062

ABSTRACT:
A method for providing improved ductility in a castable gamma titanium aluminide is taught. The method involves adding inclusions of boron to the titanium aluminide containing higher concentrations of niobium and thermomechanically working the casting. Boron additions are made in concentrations between 0.5 and 2 atomic percent. Fine grain equiaxed microstructure is found from solidified melt. Property improvements are achieved by the thermomechanical processing.

REFERENCES:
patent: 3203794 (1965-08-01), Jaffee et al.
patent: 4842820 (1989-06-01), Huang et al.
patent: 4915903 (1990-04-01), Brupbacher et al.
patent: 4915905 (1990-04-01), Kampe et al.

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