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MM: Fachverband Metall- und Materialphysik
MM 21: Phase Transformations II
MM 21.9: Talk
Wednesday, March 11, 2026, 12:30–12:45, SCH/A215
Comparison of the surface morphology of dendrites of different growth orientation in Al-Ge — •Nils Bellenbaum1, Elke Sondermann1, Fan Yang1, Paul Hans Kamm2, Tillmann Robert Neu2, Francisco García-Moreno2, Florian Kargl1,3, and Maike Becker1 — 1Institute for Frontier Materials on Earth and in Space, German Aerospace Center, Cologne, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany — 3Foundry Institute, Fundamentals of Solidification, RWTH Aachen University, Aachen, Germany
Dendritic solidification has a significant influence on the mechanical properties of metal alloys. However, the anisotropy of the interfacial energy between solid and liquid, which influences the growth direction and shape of the dendrites, is largely unkown. Recently we reported for Al-Ge a dendrite orientation transition caused by composition-related anisotropy changes [1]. Here, we present a dendrite morphology analysis based on synchrotron X-ray tomoscopy data (TOMCAT@PSI)[2]. Interface properties of segmented dendrites were determined and translated into interface shape distribution maps which allow for a comparison and identification of morphological differences of dendrites obtained from experiment and simulation.
[1] M. Becker et al. Acta Materialia 165 (2019) 666.
[2] N. Bellenbaum et al. in Proc. 8th Interntl. Conf. on Solidification and Gravity (2024), BP International (2025) 27 (DOI: 10.9734/pi/mono/978-93-49473-95-9).
Keywords: Equiaxed dendrites; x-ray tomoscopy; interface shape distribution map; solidification; interface curvature