Microstructure and segregation in splat-cooled aluminum-copper alloy

doi:10.1016/0022-0248(73)90045-6

Journal of Crystal Growth

Volume 19, Issue 4, July 1973, Pages 237-241

https://doi.org/10.1016/0022-0248(73)90045-6 Get rights and content

Abstract

Several Al-4.5 wt% Cu alloy specimens were levitated and splat-cooled under various processing conditions. Among the processing variables affecting microstructure, the dropping temperature appeared to be very important. The microstructure of foils obtained by splat-cooling droplets in the liquid-solid range was duplex with coarse dendrite cells embedded in a fine rod-like dendritic structure. In foils obtained by splat-cooling superheated droplets the fine rod-like dendritic structure was sometimes interrupted at the middle of the foil by a fine equiaxed dendritic structure. Microsegregation in splat-cooled foils, expressed as volume fraction of nonequilibrium interdendritic secondary phase θ-Al₂Cu, was about 50% lower than in a regular casting.

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Microstructure and segregation in splat-cooled aluminum-copper alloy

Abstract

J. Crystal Growth

Acta Met.

Trans. Met. Soc. AIME

J. Chem. Phys.

Trans. Met. Soc. AIME

Trans. Met. Soc. AIME