Tantalum-containing superalloys

Details Tantalum-containing superalloys Tantalum-containing superalloys

1991-02-19

1993-05-04

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148410, 148419, C22C 3000, C22F 110

Patent

active

052078469

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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