Damage tolerant anisotropic nickel base superalloy articles

Details Damage tolerant anisotropic nickel base superalloy articles Damage tolerant anisotropic nickel base superalloy articles

1995-01-30

1997-02-25

Simmons, David A.

Metal treatment

Stock

Age or precipitation hardened or strengthened

148409, C22C 1905

Patent

active

056055846

ABSTRACT:
Columnar grain and single crystal nickel base superalloys are heat treated to provide a damage tolerant microstructure. The microstructure contains large, irregularly shaped "barrier" .gamma.' particles interspersed in an ordered array of smaller cuboidal .gamma.' particles in a .gamma. phase matrix. The barrier particles interrupt the progression of cracks through the microstructure. The invention process includes solutioning the .gamma.' phase, cooling slowly to a temperature about 50.degree. F. to 150.degree. F. (28.degree. C. to 83.degree. C.) below the .gamma.' solvus temperature, further cooling at a rate of at least about 100.degree. F. (56.degree. C.) per minute to less than 1000.degree. F. (538.degree. C.), reheating to 1975.degree. F. to 2000.degree. F. (1079.degree. C. to 1093.degree. C.) and holding for about four to six hours, cooling at 100.degree. F. (56.degree. C.) per minute to less than 1000.degree. F. (538.degree. C.), and heating to 1600.degree. F. .+-.25.degree. F. (871.degree. C. .+-.14.degree. C.) and holding for 24 hours to 32 hours.

REFERENCES:
patent: 4093476 (1978-06-01), Boesch
patent: 4402772 (1983-09-01), Duhl et al.
patent: 4643782 (1987-02-01), Harris et al.
patent: 4677035 (1987-06-01), Fiedler et al.
patent: 4802934 (1989-02-01), Ohno et al.
patent: 4885216 (1989-12-01), Naik
patent: 4888069 (1989-12-01), Duhl et al.
patent: 4908183 (1990-03-01), Chin et al.
patent: 5059257 (1991-10-01), Wanner et al.
patent: 5077141 (1991-12-01), Naik et al.
patent: 5100484 (1992-03-01), Wukusick et al.
patent: 5143563 (1992-09-01), Krueger et al.
patent: 5154884 (1992-10-01), Wukusick et al.

Affiliated with

Also associated with

Rating

Damage tolerant anisotropic nickel base superalloy articles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Damage tolerant anisotropic nickel base superalloy articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damage tolerant anisotropic nickel base superalloy articles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1972168