Real-time observation of dendrite coarsening in Sn-13%Bi alloy by synchrotron microradiography.
An improved synchrotron microradiography technique is being used to study dendrite growth and coarsening in Sn-13%Bi alloy in real time. The morphology of growing dendrites can be well resolved with reasonable image contrast. Dendrite arm remelting, coalescence, and fragmentation have been observed in a real alloy and in real time during solidification under controlled thermal gradients and cooling rates. This research opens a different window to the study of alloy solidification and enables unambiguous understanding of solidification processes in optically opaque, metallic alloys.
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Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269-3136, USA.
Brody
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Kazimirov
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