Dual-property alpha-beta titanium alloy forgings

Details Dual-property alpha-beta titanium alloy forgings Dual-property alpha-beta titanium alloy forgings

1998-03-23

2000-08-29

Wyszomierski, George

Metal treatment

Stock

Age or precipitation hardened or strengthened

148671, C22F 118

Patent

active

061103020

ABSTRACT:
An alpha-beta titanium alloy preform is processed in the beta phase field, by heat treating or beta forging. The processed preform is thereafter heated into the alpha-beta phase field, and a preselected portion is forged, leaving a nonselected portion that is not forged in the alpha-beta phase field. The resulting article has a beta-processed structure in the nonselected portion, and a beta-processed plus alpha-beta forged structure in the preselected portion. In one application, the preform has the shape of a disk useful in the manufacture of an aircraft gas turbine engine. Depending upon specific requirements, either the center or the rim of the disk may be the selected portion.

REFERENCES:
patent: 3794528 (1974-02-01), Rosales et al.
patent: 5358586 (1994-10-01), Schutz et al.
patent: 5447580 (1995-09-01), Semiatin et al.
patent: 5795413 (1998-08-01), Gorman
Schuster, J., et al., Phases and Phase Relations in the Partial System TiAl.sub.3 -TiAl, Z. Metallkunde, vol. 81, No. 6, 1990, pp. 389-396, 1990.

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