Method to refine the microstructure of .alpha.-2 titanium alumin

Details Method to refine the microstructure of .alpha.-2 titanium alumin Method to refine the microstructure of .alpha.-2 titanium alumin

1993-12-23

1995-09-05

Roy, Upendra

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148421, 420900, C22C 1400, C22F 100

Patent

active

054475821

ABSTRACT:
The microstructure of alpha-2 and orthorhombic titanium aluminide alloy cast and ingot metallurgy articles is refined by: (a) hydrogenating the article at a temperature at or slightly below the .beta.-transus temperature of the alloy; (b) cooling the article, under a positive partial pressure of hydrogen, to a temperature about 20 to 40 percent below the .beta.-transus; and (c) dehydrogenating the article.

REFERENCES:
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patent: 4820360 (1989-04-01), Eylon et al.
patent: 4872927 (1989-10-01), Eylon et al.
patent: 5032357 (1991-07-01), Row
patent: 5098484 (1992-03-01), Eylon et al.
patent: 5108517 (1992-04-01), Kimura et al.

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