Abstract
Growth morphology of succinonitrile crystals under different cooling and stirring conditions was experimentally investigated by real time microscopic observation of the solidifying melt. It was found that under laminar fluid flow conditions, the solidified crystals exhibited equiaxed dendritic morphology immediately after the beginning of solidification. On the other hand, under turbulent fluid flow conditions the growth of solid particles followed a spherical mode with a high growth velocity from the initial stages of solidification. When the stirring was combined with rapid heat extraction from the rotor, a mushy layer was observed to form around the rotating chill. Under turbulent conditions, detachment of dendrite arms from this layer of rapidly coarsened dendrites is suggested to be the origin of the spherical particles in the microstructure. Formation of the layer was experimentally confirmed for an Al–Si alloy. The new findings can be used for more effective refinement of rheocast microstructures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
