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The effect of magnetically controlled fluid flow on microstructure Evolution in cast technical Al-alloys: The MICAST project

Steinbach, Sonja and Ratke, Lorenz and Zimmermann, Gerhard and Sturz, Laszlo and Roosz, A. and Kovacs, Jeno and Fautrelle, Yves and Budenkova, Olga and Lacaze, J. and Dost, S. and Grün, Gerd-Ulrich and Warnken, N. and Wu, Menghuai and Sillekens, W. (2018) The effect of magnetically controlled fluid flow on microstructure Evolution in cast technical Al-alloys: The MICAST project. In: Solidification and Gravity 2018, p. 39. Solidification and Gravity 2018, 03. - 06. September 2018, Miskolc-Lillafüred, Ungarn. ISBN 978-963-508-889-8.

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Abstract

The ESA-MAP research program MICAST (Microstructure Formation in CASTing of Technical Alloys under Diffusive and Magnetically Controlled Convective Conditions) focuses on a systematic analysis of the effect of convection on microstructure evolution in cast Al-alloys. Questions are, for example, how intensity of convection and flow direction act on the evolution of the mushy zone, on macro- and micro-segregations, on dendrite morphology, on the growth mode and on spatial distribution of intermetallic precipitates. In order to simplify the complex interactions between heat and mass transport and microstructure evolution, the experiments performed by the MICAST team are carried out under well-defined thermally and magnetically controlled convective boundary conditions using directional solidification. They are analysed using advanced diagnostics and theoretical modelling, involving micro-modelling and global simulation of heat and mass transport. The MICAST team uses binary, ternary (enriched with Fe and Mn) and technical alloys of the industrially relevant Al Si cast alloys family. In the frame of the MICAST project solidification experiments were performed on the International Space Station (ISS) in the ESA payload Materials Science Laboratory (MSL) with a low gradient furnace (LGF) and a high(er) gradient one (SQF, Solidification and Quenching Furnace) to complement the scanning of a range of solidification times. Binary Al-7wt.%Si and ternary Al-7wt.%Si-1wt.%X (X=Fe, Mn) alloy samples were directionally solidified under both purely diffusive and stimulated convective conditions induced by a Rotating Magnetic Field (RMF). This contribution gives an overview on recent experimental results and theoretical modelling of the MICAST team and gives an outlook for the upcoming years of ISS experimentations by the team and the questions to be addressed with future experiments.

Item URL in elib:https://elib.dlr.de/121640/
Document Type:Conference or Workshop Item (Speech)
Title:The effect of magnetically controlled fluid flow on microstructure Evolution in cast technical Al-alloys: The MICAST project
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Steinbach, Sonjasonja.steinbach (at) dlr.deUNSPECIFIED
Ratke, LorenzUNSPECIFIEDUNSPECIFIED
Zimmermann, GerhardACCESS, AachenUNSPECIFIED
Sturz, LaszloACCESS, AachenUNSPECIFIED
Roosz, A.University of MiskolcUNSPECIFIED
Kovacs, JenoUniversity of Miskolc, HungaryUNSPECIFIED
Fautrelle, YvesSIMAP Grenoble Institute of TechnologyUNSPECIFIED
Budenkova, OlgaSIMAP Grenoble Institute of TechnologyUNSPECIFIED
Lacaze, J.Cirimat, ToulouseUNSPECIFIED
Dost, S.University of VictoriaUNSPECIFIED
Grün, Gerd-UlrichHydro Aluminium Deutschland GmbH, BonnUNSPECIFIED
Warnken, N.University of BirminghamUNSPECIFIED
Wu, MenghuaiUniversity of Leoben, AustriaUNSPECIFIED
Sillekens, W.ESTEC, NoordwijkUNSPECIFIED
Date:September 2018
Journal or Publication Title:Solidification and Gravity 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 39
Editors:
EditorsEmailEditor's ORCID iD
Roosz, A.University of MiskolcUNSPECIFIED
Veres, Zs.University of MiskolcUNSPECIFIED
Svéda, M.University of MiskolcUNSPECIFIED
Karacs, G.University of MiskolcUNSPECIFIED
ISBN:978-963-508-889-8
Status:Published
Keywords:solidification, Al-alloys, fluid flow, forced convection, magnetic field
Event Title:Solidification and Gravity 2018
Event Location:Miskolc-Lillafüred, Ungarn
Event Type:international Conference
Event Dates:03. - 06. September 2018
Organizer:Hungarian Academy of Science, University of Miskolc
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Steinbach, Dr.rer.nat. Sonja
Deposited On:12 Sep 2018 08:53
Last Modified:28 Mar 2019 08:51

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