Investigations of fluid flow effects on dendritic solidification: Consequences on fragmentation, macrosegregation and the influence of electromagnetic stirring
Investigations of fluid flow effects on dendritic solidification: Consequences on fragmentation, macrosegregation and the influence of electromagnetic stirring
Shevchenko, N.; Neumann-Heyme, H.; Pickmann, C.; Schaberger-Zimmermann, E.; Zimmermann, G.; Eckert, K.; Eckert, S.
Abstract
Solidification experiments and numerical simulations have been performed to improve the understanding of the complex interrelation between melt flow and the formation of dendritic structures during solidification of Al-Cu and Ga-In alloys. Melt flow induces various effects on grain morphology primarily caused by convective transport of solute, such as a facilitation of the growth of primary trunks or lateral branches, dendrite remelting, fragmentation or freckle formation depending on the dendrite orientation, the flow direction and intensity. Within this project special interest was focused on fragmentation and segregation phenomena. Natural convection is caused by density variations within the solidifying alloys. Forced convection was produced by electromagnetic stirring. X-ray radioscopy was applied as a powerful tool for the visualization of dendritic growth and coarsening.
Keywords: Fluid flow; dendritic solidification; fragmentation; macrosegregation; electromagnetic stirring
Beteiligte Forschungsanlagen
- Rossendorf Beamline an der ESRF DOI: 10.1107/S1600577520014265
Verknüpfte Publikationen
- DOI: 10.1107/S1600577520014265 is cited by this (Id 26913) publication
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IOP Conference Series: Materials Science and Engineering 228(2017), 012005
DOI: 10.1088/1757-899X/228/1/012005
Cited 14 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-26913