Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1989-06-28
1991-04-23
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75241, 75244, 75246, 419 12, 419 16, 419 28, 419 29, 419 39, 419 49, 419 54, 419 60, C22C 2904
Patent
active
050097040
ABSTRACT:
A nickel-based superalloy article formed from particles of the superalloy is processed to have a microstructure which is resistant to failure when processed using high strain thermomechanical processes. Articles having the desired microstrucuture are produced by hot isostatically pressing powder of the superalloy in a specified temperature range bounded by the incipient melting temperature as a minimum and the solvus temperature of stable high temperature phases. The compact is held under pressure in the specified temperature range to diffuse deleterious phases which exist as a result of the initial powder atomization operation. The powder compact thus formed can be processed using conventional processes to produce material for subsequent thermomechanical processing using high strain rate forging equipment and retain the benefits of chemical uniformity and cleanliness associated with traditional powder metal processes.
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Allied-Signal Inc.
Bhat Nina
Lechert Jr. Stephen J.
McFarland James W.
Walsh Robert A.
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