Cast and forged gamma titanium aluminum alloys modified by boron

Details Cast and forged gamma titanium aluminum alloys modified by boron Cast and forged gamma titanium aluminum alloys modified by boron

1993-04-06

1994-06-28

Roy, Upendra

Metal treatment

Stock

Titanium, zirconium, or hafnium base

148670, 420418, 420421, C22C 1400

Patent

active

053243676

ABSTRACT:
A TiAl composition is prepared to have high strength, high oxidation resistance and to have acceptable ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be a highly desirable effective aluminum concentration and by addition of chromium and tantalum and boron ingredients according to the approximate formula Ti-Al.sub.46-50 Cr.sub.2 Ta.sub.2-4 B.sub.0.05-0.2. Homogenization of the composition above the alpha transus temperature is used in combination with the boron doping to achieve higher ductility without sacrifice of strength.

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