Nickel-base superalloys and articles formed therefrom

Details Nickel-base superalloys and articles formed therefrom Nickel-base superalloys and articles formed therefrom

2008-09-16

2008-09-16

Wilkins, III, Harry D (Department: 1795)

Metal treatment

Stock

Age or precipitation hardened or strengthened

C148S428000, C420S448000

Reissue Patent

active

11077572

ABSTRACT:
An article, such as a turbine engine component, formed from a nickel-base superalloy, the nickel-base superalloy containing a γ″ tetragonal phase and comprising aluminum, titanium, tantalum, niobium, chromium, molybdenum, and the balance nickel, wherein the article has a time dependent crack propagation resistance of at least about 20 hours to failure at about 1100° F. in the presence of steam. The invention also includes a nickel-base superalloy for forming such and article and methods of forming the article and making the nickel-base superalloy.

REFERENCES:
patent: 3046108 (1962-07-01), Eiselstein
patent: 4888253 (1989-12-01), Snyder et al.
patent: 4979995 (1990-12-01), Hattori et al.
patent: 4981644 (1991-01-01), Chang
patent: 5129969 (1992-07-01), Henry
patent: 5338379 (1994-08-01), Kelly
patent: 5556594 (1996-09-01), Frank et al.
patent: 5679180 (1997-10-01), DeLuca
patent: 2270324 (1994-03-01), None
patent: 59-211560 (1984-11-01), None
“Nickel, Cobalt, and Their Alloys”, pub. ASM International, 2000 (no month), pp. 69-77, 82-83, 233-234 and 302-303.

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