The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1982
Filed:
Jan. 28, 1980
Edgar E Brown, Glastonbury, CT (US);
Duane L Ruckle, Glastonbury, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
Disclosed is a nickel base alloy of the gamma-gamma prime type, the composition of which is controlled, to provide a gamma matrix phase in which solid solution hardener elements are minimized, to less than 12.5 weight percent. Preferably, the alloy consists essentially by weight percent of 0.25-9Al, 1-4Ti, 2-6Cb, 0.01-0.1C, at least one material selected from the group consisting by weight percent of 0-6Co, 0-6Mo, 2-7.5Cr, 0-2.5Hf and mixtures thereof, balance nickel. The gamma prime fraction in a heat treated article is in the range 10-45 volume percent. The stacking fault energy is preferably in the range 80-120 ergs/cm.sup.2. A gas turbine engine disc made of the material exhibits a three fold increase in fatigue life in the 550-750.degree. C. range, as compared to discs made of typical superalloys in current use, while retaining comparable tensile and stress rupture strength.