Heat treated single crystal articles and process

Details Heat treated single crystal articles and process Heat treated single crystal articles and process

1980-08-11

1982-05-04

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148162, 148404, C22F 110

Patent

active

043280455

ABSTRACT:
An alloy composition coasting scheme and specific heat treatment process are described for the production of directionally solidified single crystal articles which have exceptional properties. The alloy is based on the Ni-Al-Mo system, preferably with additions of Ta. The process for producing the article inclused directional solidification at a high rate to produce a fine dendritic microstructure. A combined homogenizing and solution treatment is performed to provide a unique chemically homogeneous single phase microstructure. This homogeneous article is rapidly quenched and then aged at an intermediate temperature to develop a controlled uniform distribution of fine gamma prime phase particles.

REFERENCES:
patent: 3617397 (1971-11-01), Maxwell
patent: 3642543 (1972-02-01), Owczarski
patent: 3655462 (1972-04-01), Maxwell
patent: 3668023 (1972-06-01), Kotval
patent: 3802938 (1974-04-01), Collins et al.
patent: 3904403 (1975-09-01), Komatsu et al.
patent: 3933483 (1976-01-01), Komatsu et al.
patent: 4012241 (1977-03-01), Lemkey
patent: 4092183 (1978-05-01), Grundy
patent: 4116723 (1978-09-01), Gell et al.

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