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Rapid solidification is expected to produce fine grained superalloys displaying enhanced mechanical properties. The current paper describes the production of melt-spun ribbon.5 of two nickel base superalloys (Rene' 80 and IN738LC) and a cobalt-base superalloy (FSX414). Their microstructures have been characterized by metallographic techniques, electrical resistivity changes and hardness measurements. Tensile p'roperties were determined at ambient and elevated temperatures, where values of the strain rate sensitivity indicate that micrograin superplasticity may be occurring.

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