High ductility nickel alloy directional casting of parts for hig

Details High ductility nickel alloy directional casting of parts for hig High ductility nickel alloy directional casting of parts for hig

1981-06-24

1984-07-24

Dean, R.

Metal treatment

Stock

Directionally solidified

148410, 148428, C22C 1905

Patent

active

044616597

ABSTRACT:
An improved alloy for use in directional solidification casting is disclosed in which the proportions of carbon, zirconium, tungsten and molybdenum have been changed to produce a new ultra high strength casting alloy free of the problem of grain boundary cracking which has been encountered in the production of directional solidification castings of this type of alloy and to minimize M.sub.6 C plate phase formation in turbine blades under high temperature conditions over extended operating periods. In addition there is disclosed the unexpected characteristic of the alloy's substantial increase in fracture toughness and tensile ductility under extreme operating conditions.

REFERENCES:
patent: 3720509 (1973-03-01), Danesi et al.

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