Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys

The solidification of AlCuSi alloys with Mn and Fe was studied by rotating a magnetic field to understand the effect of melt flow. The specimens solidified with a forced convection, low cooling rate and low temperature gradient. Electromagnetic stirring generated by an electric coil around the speci...

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Autor principal:	Piotr Mikolajczak
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	electromagnetic stirring aluminum alloys solidification dendrite arm spacing rosettes Al<sub>2</sub>Cu phases Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/9b3e0f514e144363909ff3265ee1c9db
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spelling	oai:doaj.org-article:9b3e0f514e144363909ff3265ee1c9db2021-11-25T18:22:05ZEffect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys10.3390/met111118042075-4701https://doaj.org/article/9b3e0f514e144363909ff3265ee1c9db2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1804https://doaj.org/toc/2075-4701The solidification of AlCuSi alloys with Mn and Fe was studied by rotating a magnetic field to understand the effect of melt flow. The specimens solidified with a forced convection, low cooling rate and low temperature gradient. Electromagnetic stirring generated by an electric coil around the specimens caused a transformation from equiaxed dendritic to rosette morphology, occasionally with spheroids and minor dendrites. The transformation was quantitatively observed with a specific surface S<sub>v</sub>, that decreased for almost all alloys and marked the flow effect on α-Al. The computer coupling of phase diagrams and thermochemistry (CALPHAD) technique was applied for the calculation of phase diagrams and property diagrams. Forced convection decreased secondary dendrite arm spacing λ<sub>2</sub> in almost all alloys, while it increased slightly in one studied alloy. The length of detrimental β-Al<sub>5</sub>FeSi phases decreased in the alloy, where β starts to precipitate in the presence of α-Al, while increasing in alloys where β starts as first and grows in the fully liquid melt. The average overall dimension of the Mn-rich phases increased in almost all alloys, and the number density decreased under flow. The modification of spacing for AlSi-eutectics and Al<sub>2</sub>Cu was analyzed. It was found that the occurrence of Al<sub>2</sub>Cu does not influence the fluid flow and vice versa.Piotr MikolajczakMDPI AGarticleelectromagnetic stirringaluminum alloyssolidificationdendrite arm spacingrosettesAl<sub>2</sub>Cu phasesMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1804, p 1804 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electromagnetic stirring aluminum alloys solidification dendrite arm spacing rosettes Al<sub>2</sub>Cu phases Mining engineering. Metallurgy TN1-997
spellingShingle	electromagnetic stirring aluminum alloys solidification dendrite arm spacing rosettes Al<sub>2</sub>Cu phases Mining engineering. Metallurgy TN1-997 Piotr Mikolajczak Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys
description	The solidification of AlCuSi alloys with Mn and Fe was studied by rotating a magnetic field to understand the effect of melt flow. The specimens solidified with a forced convection, low cooling rate and low temperature gradient. Electromagnetic stirring generated by an electric coil around the specimens caused a transformation from equiaxed dendritic to rosette morphology, occasionally with spheroids and minor dendrites. The transformation was quantitatively observed with a specific surface S<sub>v</sub>, that decreased for almost all alloys and marked the flow effect on α-Al. The computer coupling of phase diagrams and thermochemistry (CALPHAD) technique was applied for the calculation of phase diagrams and property diagrams. Forced convection decreased secondary dendrite arm spacing λ<sub>2</sub> in almost all alloys, while it increased slightly in one studied alloy. The length of detrimental β-Al<sub>5</sub>FeSi phases decreased in the alloy, where β starts to precipitate in the presence of α-Al, while increasing in alloys where β starts as first and grows in the fully liquid melt. The average overall dimension of the Mn-rich phases increased in almost all alloys, and the number density decreased under flow. The modification of spacing for AlSi-eutectics and Al<sub>2</sub>Cu was analyzed. It was found that the occurrence of Al<sub>2</sub>Cu does not influence the fluid flow and vice versa.
format	article
author	Piotr Mikolajczak
author_facet	Piotr Mikolajczak
author_sort	Piotr Mikolajczak
title	Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys
title_short	Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys
title_full	Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys
title_fullStr	Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys
title_full_unstemmed	Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys
title_sort	effect of rotating magnetic field on microstructure in alcusi alloys
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9b3e0f514e144363909ff3265ee1c9db
work_keys_str_mv	AT piotrmikolajczak effectofrotatingmagneticfieldonmicrostructureinalcusialloys
_version_	1718411274584326144

Effect of Rotating Magnetic Field on Microstructure in AlCuSi Alloys

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