Tantalum-containing superalloys

Details Tantalum-containing superalloys Tantalum-containing superalloys

1992-12-17

1994-08-16

Dean, Richard O.

Metal treatment

Stock

Age or precipitation hardened or strengthened

148419, 148428, 148675, C22C 1905

Patent

active

053383796

ABSTRACT:
Nickel base superalloys which contain niobium (columbium) to promote gamma double prime strengthening are improved by replacing the niobium with tantalum on an atom-for-atom basis and then heat treating the new alloy at temperatures in excess of those conventionally used for superalloys which include niobium. The resultant tantalum-bearing alloys are found to exhibit increased strength and greater phase stability than corresponding niobium-bearing alloys.

REFERENCES:
patent: 3668023 (1972-06-01), Kotval
patent: 4981644 (1991-01-01), Chang

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