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Cooling Rates and Fine Microstructures of Rsr and Argon Atomized Superalloy Powders

Published online by Cambridge University Press:  15 February 2011

F. Cosandey ,
R.D. Kissinger  and
J.K. Tien
F. Cosandey
Affiliation:
Henry Krumb School of Mines, Columbia University, New York, NY 10027 USA
R.D. Kissinger
Affiliation:
Henry Krumb School of Mines, Columbia University, New York, NY 10027 USA
J.K. Tien
Affiliation:
Henry Krumb School of Mines, Columbia University, New York, NY 10027 USA
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Abstract

Superalloy powders of an IN 792 plus Hf type alloy produced from Rapid Solidification (RSR) and Argon Atomized process (AA) techniques are analyzed and compared according to particle size. Characterization of powders include surface and interior morphology, particle size and void distribution, cooling microstructures, microcrystallinity, microsegretation and especially dendrite arm spacing and cooling rates. It is found that, for the alloy studied, RSR cooling rates are a factor of only two to four greater than those for AA, regardless of particle size.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 8 , 1981 , 173
Copyright
Copyright © Materials Research Society 1982

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References

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