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Structure/Property Relationships and Applications of Rapidly Solidified Aluminum Alloys

Published online by Cambridge University Press:  15 February 2011

C. M. Adam
C. M. Adam*
Affiliation:
Pratt & Whitney Aircraft, Government Products Division, P.O. Box 2691, West Palm Beach, Florida, USA
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Abstract

During the last five years Pratt & Whitney Aircraft has developed rapid solidification powder metallurgy and consolidation techniques to produce advanced aluminum alloys. A centrifugal rotary atomization device with forced high velocity helium convective cooling has been developed to pilot-plant stage, to produce aluminum alloys of novel compositions for advanced gas turbine engine applications. Rapidly solidified aluminum alloys solidify as spherical droplets up to 100 μm diameter with cooling rates of 105 — 106 K/sec, and demonstrate new microstructural features which have been exploited to develop elevated temperature mechanical properties. Alloys have been developed for 400 — 500°F fan and compressor applications that have traditionally used titanium alloys, and this paper reviews the microstructural evolution of rapidly solidified structures during thermomechanical processing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 8 , 1981 , 411
Copyright
Copyright © Materials Research Society 1982

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