Galenko, P.K. and Phanikumar, G. and Funke, O. and Chernova, L. and Reutzel, S. and Kolbe, M. and Herlach, D.M. (2007) Dendritic solidification and fragmentation in undercooled Ni-Zr alloys. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 449-45, pp. 649-653. Elsevier. doi: 10.1016/j.msea.2006.02.435. ISSN 0921-5093.
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Abstract
Kinetics of dendritic solidification and fragmentation of dendritic crystals in undercooled Ni–Zr samples are studied. Using the capacitance proximity sensor technique and a high-speed-camera system, the dendrite growth velocity has been measured as a function of initial undercooling in solidifying droplets processed by the electromagnetic levitation technique. Analyses of solidified droplets give evidence to a transition from coarse grained dendrites to grain refined dendrites (CG-GR) at small undercooling, a transition from grain refined dendrites to coarse grained dendrites (GR-CG) at moderate undercooling, and to a second transition from coarse grained dendrites to grain refined dendrites (CG-GR) at a higher undercooling. Predictions of a sharp-interface model are compared with the results of experiments on Ni–Zr samples.
Item URL in elib: | https://elib.dlr.de/47501/ | ||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||
Title: | Dendritic solidification and fragmentation in undercooled Ni-Zr alloys | ||||||||||||||||||||||||||||||||
Authors: |
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Date: | 2007 | ||||||||||||||||||||||||||||||||
Journal or Publication Title: | Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing | ||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
Volume: | 449-45 | ||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.msea.2006.02.435 | ||||||||||||||||||||||||||||||||
Page Range: | pp. 649-653 | ||||||||||||||||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||||||||||||||||
ISSN: | 0921-5093 | ||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||
Keywords: | Unterkühlung von Materialien | ||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||||||||||||||||||
HGF - Program: | Space (old) | ||||||||||||||||||||||||||||||||
HGF - Program Themes: | W FR - Forschung unter Weltraumbedingungen (old) | ||||||||||||||||||||||||||||||||
DLR - Research area: | Space | ||||||||||||||||||||||||||||||||
DLR - Program: | W FR - Forschung unter Weltraumbedingungen | ||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | W - Vorhaben Materialwissenschaftliche Forschung (old) | ||||||||||||||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Materials Physics in Space > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS) | ||||||||||||||||||||||||||||||||
Deposited By: | Parpart, Ingeborg | ||||||||||||||||||||||||||||||||
Deposited On: | 05 Jun 2007 | ||||||||||||||||||||||||||||||||
Last Modified: | 06 Sep 2019 15:28 |
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