Eutectic dendrite growth in undercooled Fe 83 B 17 alloy: Experiments and modeling

The Fe83B17 eutectic alloy was undercooled by an electromagnetic levitator ranging up to an undercooling 217 K and the recalescence fronts were in-situ recorded by a high-speed camera. The measured growth velocity as a function of undercooling was well predicted by the current eutectic dendrite model for concentrated alloys with a non-linear phase-diagram but not the previous models for dilute alloys with a linear phase-diagram. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.