High strength Ti alloy material having improved workability and

Details High strength Ti alloy material having improved workability and High strength Ti alloy material having improved workability and

1986-06-13

1989-12-26

McDowell, Robert

Metal treatment

Stock

Age or precipitation hardened or strengthened

148 127B, 420420, C22F 118, C22C 1400

Patent

active

048891703

ABSTRACT:
Herein disclosed are a high-strength Ti alloy material having improved workability which contains 2-5% Al, 5-12% V and 0.5-8% Mo (the percents being on a weight basis) and which satisfies the relation: 14%.ltoreq.1.5.times.(V content)+(Mo content).ltoreq.21%, with the balance being Ti and incidental impurities, and a process for producing such high -strength Ti alloy material.
The process comprises: preparing a Ti alloy ingot having the above specified composition; hot working the ingot at a temperature wihtin the range of 600.degree.-950.degree. C.; subjecting the work to solid solution treatment at a temperature in the range of 700.degree.-800.degree. C.; and age-hardening the work at a temperatrue between 300.degree. and 600.degree. C. The reesulting Ti alloy material is suitable for use in the fabrication of parts of aircraft where high specific strength and heat resistance are required.

REFERENCES:
patent: 2754203 (1956-07-01), Vordahl
patent: 2893864 (1959-07-01), Harris et al.
patent: 3405016 (1968-10-01), Jaffee et al.
patent: 3595645 (1971-07-01), Hunter et al.
patent: 3615378 (1971-10-01), Bamberger, Jr. et al.
patent: 3986868 (1976-10-01), Crossley
patent: 4197643 (1980-04-01), Burnstone et al.
Reinsch et al., "Three Recent Developments in Titanium Alloys", Metals Progress, Mar. 1980, pp. 64-70.

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