Laves free cast+hip nickel base superalloy

Details Laves free cast+hip nickel base superalloy Laves free cast+hip nickel base superalloy

1985-12-30

1988-06-14

Dean, R.

Metal treatment

Compositions

Heat treating

148 3, 148 115N, 148 127N, 148127, 148410, 148428, C22F 110

Patent

active

047509449

ABSTRACT:
A nickel base superalloy composition useful in the cast+HIP+heat treated condition is described. Articles having the invention composition have properties which are comparable to similarly processed IN718 articles. The invention alloys have an as-cast microstructure which is substantially free from Laves phase, even at slow solidification rates. As a result, the alloys are significantly more weldable than IN718. This desirable microstructure is achieved by modifications of the chromium, molybdenum, iron, and nickel contents compared to the typical IN718 composition.

REFERENCES:
patent: 3046108 (1962-07-01), Eiselstein
R. Vincent, "Precipitation Around Welds in the Nickel-Base Superalloy, Inconel 718", Acta Metallurgica, vol. 33, No. 7, pp. 1205-1216 (1985).
R. C. Hall, "The Metallurgy of Alloy 718," Journal of Basic Engineering, pp. 511-516 (Sep. 1967).
H. L. Eiselstein, "Metallurgy of a Columbium-Hardened Nickel-Chromium-Iron Alloy", American Society for Testing and Materials, Special Technical Publication No. 369, Advances in the Technology of Stainless Steels and Related Alloys, Philadelphia, Apr. 1965.
H. J. Wagner and A. M. Hall, "Physical Metallurgy of Alloy 718", Defense Metal Information Center Report 217, Battelle Memorial Institute, Columbus, Jun. 1, 1965.

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