Solidification behaviour of silver-copper alloys in a drop tube

Ag-15wt%Cu hypoeutectic and Ag-28.1wt%Cu eutectic alloys were solidified in a containerless environment using a 3m drop tube. It is found that for Ag-15wt%Cu hypoeutectic alloy, with the decreasing of the droplet size, a “dendritic-equiaxed” morphology transition takes place. Meanwhile, for Ag-28.1w...

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Bibliographic Details
Published in:Advances in space research 1999-01, Vol.24 (10), p.1257-1261
Main Authors: Wang, N., Cao, C.D., Wei, B.
Format: Article
Language:English
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Summary:Ag-15wt%Cu hypoeutectic and Ag-28.1wt%Cu eutectic alloys were solidified in a containerless environment using a 3m drop tube. It is found that for Ag-15wt%Cu hypoeutectic alloy, with the decreasing of the droplet size, a “dendritic-equiaxed” morphology transition takes place. Meanwhile, for Ag-28.1wt%Cu eutectic alloy, a “regular lamellar eutectic-irregular anomalous eutectic” microstructure change occurs. The dendrite fragmentation mechanism and TMK model of eutectic growth were used to analyze the experimental results.
ISSN:0273-1177
1879-1948
DOI:10.1016/S0273-1177(99)00729-2