Damage tolerant anisotropic nickel base superalloy articles

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

1996-01-05

1999-05-04

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148555, 148562, C21D 900

Patent

active

059000848

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: 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: 5077141 (1991-12-01), Nail et al.
patent: 5100484 (1992-03-01), Wukusick et al.
patent: 5154884 (1992-10-01), Wukusick et al.
patent: 5312497 (1994-05-01), Mathey

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-1867781