Mechanically worked single crystal article

Details Mechanically worked single crystal article Mechanically worked single crystal article

1982-12-06

1985-07-09

Rutledge, L. Dewayne

Metal treatment

Stock

Directionally solidified

148 39, 416241R, C22F 110

Patent

active

045280487

ABSTRACT:
A single crystal nickel base superalloy component, such as a gas turbine blade (20, 28) is mechanically deformed at elevated temperature to improve the yield strength of a portion which is used at temperatures below 800.degree. C., compared to a portion which is used at a higher temperature. A blade (20) has a root (22) which is deformed by 2-14% at 700.degree.-1100.degree. C. and an airfoil (24) which is not deformed. The root yield strength is increased 15-50% while the airfoil creep strength is maintained.

REFERENCES:
patent: 3228095 (1966-01-01), Bird et al.
patent: 3494709 (1970-02-01), Piearcey
patent: 3642543 (1972-02-01), Owczarski et al.
patent: 4184900 (1980-01-01), Erickson et al.
patent: 4345950 (1982-08-01), O'Hara
patent: 4392894 (1983-07-01), Pearson et al.

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