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The Microstructure Response to Fluid Flow Fields in Al-cast Alloys

Steinbach, Sonja and Ratke, Lorenz (2007) The Microstructure Response to Fluid Flow Fields in Al-cast Alloys. In: Transactions of Indian Institute of Metals, 60 (2), pp. 167-171. International Conference on Solidification Science and Processing (ICSSP-III), 2006-11-19 - 2006-11-23, Jaipur (India).

Full text not available from this repository.

Official URL: http://www.igcar.ernet.in/transiim/

Abstract

The effect of controlled fluid flow conditions on the microstructure formation in cast Al-alloys was studied experimentally. A pure ternary Al-6wt.%Si-4wt.%Cu alloy has been directionally solidified upwards under a medium temperature gradient (3K/mm) in an aerogel-based furnace facility over a wide range of constant solidification velocities (0.015-0.15mm/s). A coil system around the sample induces a homogeneous rotating magnetic field being able to generate a controlled fluid flow in the melt close to the growing solid-liquid interface. The application of rotating magnetic fields during directional solidification results in pronounced segregation effects. For high magnetic induction and therefore high fluid flow velocity a change to pure eutectic solidification at the axis of the sample is observed. The investigations show that the microstructural features like the primary dendrite and the secondary dendrite arm spacing change in a unique manner with solidification speed and rotating magnetic induction, clearly revealing the dramatic effects of fluid flow on the solidification kinetics.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:The Microstructure Response to Fluid Flow Fields in Al-cast Alloys
Authors:
AuthorsInstitution or Email of Authors
Steinbach, SonjaUNSPECIFIED
Ratke, LorenzUNSPECIFIED
Date:April 2007
Journal or Publication Title:Transactions of Indian Institute of Metals
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:60
Page Range:pp. 167-171
Status:Published
Keywords:Al-Si-Cu, directional solidification, fluid flow, electromagnetic stirring, dendrite spacing, microgravity, aluminum alloys
Event Title:International Conference on Solidification Science and Processing (ICSSP-III)
Event Location:Jaipur (India)
Event Type:international Conference
Event Dates:2006-11-19 - 2006-11-23
Organizer:Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur & MNIT Jaipur, India
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 Materialforschung unter Mikro-g (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: Dr.rer.nat. Sonja Steinbach
Deposited On:09 Jul 2007
Last Modified:27 Apr 2009 13:19

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