Directionally solidified eutectic .gamma.+.beta. nickel-base sup

Details Directionally solidified eutectic .gamma.+.beta. nickel-base sup Directionally solidified eutectic .gamma.+.beta. nickel-base sup

1976-06-01

1977-08-30

Dean, R.

Metal treatment

Compositions

Heat treating

75170, C22C 1903

Patent

active

040452557

ABSTRACT:
A directionally solidified multivariant eutectic .gamma.+.beta. nickel-base superalloy casting having improved high temperature strength and oxidation resistance properties is provided comprising a two phase eutectic structure containing, on a weight percent basis, 5.0-15.0 tungsten, 8.5-14.5 aluminum, 0.0-35.0 cobalt and the balance being nickel. Embedded within the .gamma. phase nickel-base matrix are aligned eutectic .beta. phase (primarily (Ni,Co)Al reinforcing lamellae.

REFERENCES:
patent: 3944416 (1976-03-01), Walter

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