Patent Number: 6,332,935

Title: Processing of titanium-alloy billet for improved ultrasonic inspectability

Abstract: A starting workpiece of a titanium-base alloy having a temperature-composition phase diagram with a beta region and an alpha-beta region separated by a beta transus temperature is processed by first forging the starting workpiece at a first temperature in the beta region to form a billet, thereafter second forging the billet at a second temperature in the alpha-beta region, thereafter third forging the billet at a third temperature in the beta region, thereafter fourth forging the billet at a fourth temperature in the alpha-beta region so that the step of fourth forging accomplishes a reduction in cross-sectional area of from about 5 to about 40 percent, and thereafter ultrasonic testing the billet. The beta-region third forging step combined with a relatively small reduction during the alpha-beta-region fourth forging step produce a microstructure that is conducive to ultrasonic inspection with minimal interference from noise.

Inventors: Gorman; Mark D. (West Chester, OH), Woodfield; Andrew P. (Cold Spring, KY)

Assignee: General Electric Company

International Classification: C22F 1/18 (20060101); C22F 001/18 ()

Expiration Date: 12/25/2018