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Effect fo stirring induced by rotating magnetic field on b-Al5FeSi intermetallic phases during directional solidification in AlSi alloys

Mikolajczak, Piotr and Ratke, Lorenz (2013) Effect fo stirring induced by rotating magnetic field on b-Al5FeSi intermetallic phases during directional solidification in AlSi alloys. International Journal of Cast Metals Research, 26 (6), pp. 339-353. Taylor & Francis. DOI: 10.1179/1743133613Y.000000069 ISSN 1364-0461

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Abstract

In AlSi alloys, iron plays an important role and as one of the main impurities causes formation of β-Al5FeSi intermetallics. This study aims to understand the effect of fluid flow on the microstructure and intermetallics in Al-5/7/9 wt.% Si 0.2/0.5/1.0 wt.% Fe alloys directionally solidified under defined thermal and fluid flow conditions (generated trough rotating magnetic field RMF). The solidification experiments were conducted in a special furnace facility Artemis-3 allowing perfectly controlled directional solidification. The results showed that forced flow can cause shortening of the β platelets in dendritic regions and lengthening in eutectics together with increasing their number density. The studies have shown that application of stirring by RMF for AlSi alloys could lead to better results in shortening β-Al5FeSi than lowering Fe content in the range from 1.0 to 0.2 wt.% Fe. It is deduced that melt flowing together with β phases reaches the superheated bulk where intermetallics could be fragmented or remelted, and finally microstructures with shorter β-Al5FeSi and higher number density of β might be obtained.

Item URL in elib:https://elib.dlr.de/85170/
Document Type:Article
Title:Effect fo stirring induced by rotating magnetic field on b-Al5FeSi intermetallic phases during directional solidification in AlSi alloys
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mikolajczak, PiotrUNSPECIFIEDUNSPECIFIED
Ratke, LorenzUNSPECIFIEDUNSPECIFIED
Date:December 2013
Journal or Publication Title:International Journal of Cast Metals Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:26
DOI :10.1179/1743133613Y.000000069
Page Range:pp. 339-353
Publisher:Taylor & Francis
ISSN:1364-0461
Status:Published
Keywords:iron intermetallic phases, β-Al5FeSi, fluid flow, aluminum alloys, solidification
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dennstedt, Dr. Anne
Deposited On:11 Nov 2013 09:04
Last Modified:06 Sep 2019 15:19

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