Process for producing forged .alpha.-2 based titanium aluminides

Details Process for producing forged .alpha.-2 based titanium aluminides Process for producing forged .alpha.-2 based titanium aluminides

1996-08-29

1999-05-25

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148670, C22F 118

Patent

active

059066920

ABSTRACT:
Process for improving the mechanical properties and ultrasonic inspection efficiency of alpha-2 titanium aluminide forged products, parts or components and for preserving or retaining these improved properties at use temperatures up to about 1200.degree. F. The process involves heating a billet of the alloy below its beta transus temperature, forging the heated billet within a true strain range of about 1.2 and 1.4 and within a strain rate of about 0.1 and 0.15 per second to produce >90% refinement of prior .beta. grains to a typical size less than about 0.2 mm, preferably about 0.02 mm, and cooling the forged billet to room temperature. A heat-treatment may be applied by rapidly cooling to room temperature to form the transformed beta phase with no precipitation of alpha platelets, and then heating to a transformation temperature (T) for a period of time (t) to form a beneficial orthorhombic crystalline phase microstructure including very fine alpha-2 particles, and not heating the alloy again above the use temperature of 1200.degree. F., whereby the beneficial microstructure is retained and remains stable for extended periods of exposure at or below 1200.degree. F.

REFERENCES:
patent: 5185045 (1993-02-01), Peters et al.
patent: 5190603 (1993-03-01), Nazmy et al.
patent: 5281285 (1994-01-01), Marquardt

Affiliated with

Also associated with

Rating

Process for producing forged .alpha.-2 based titanium aluminides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing forged .alpha.-2 based titanium aluminides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing forged .alpha.-2 based titanium aluminides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-399544