Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026 |
Resumo: | The main purpose of this paper is to investigate both the columnar to equiaxed transition and primary dendritic arm spacings of Al-3wt.%Si alloy during the horizontal directional solidification. The transient heat transfer coefficient at the metal-mold interface is calculated based on comparisons between the experimental thermal profiles in castings and the simulations provided by a finite difference heat flow program. Simulated curve of the interfacial heat transfer coefficient was used in another numerical solidification model to determine theoretical values of tip growth rates, cooling rates and thermal gradients that are associated with both columnar to equiaxed transition and primary dendritic arm spacings. A good agreement was observed between the experimental values of these thermal variables and those numerically simulated for the alloy examined. A comparative analysis is carried out between the experimental data of this work and theoretical models from the literature that have been proposed to predict the primary dendritic spacings. In this context, this study may contribute to the understanding of how to manage solidification operational parameters aiming at designing the microstructure of Al-Si alloys. |
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Materials research (São Carlos. Online) |
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Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidificationcolumnar to equiaxed transitionprimary dendritic spacingdirectional solidificationunsteady-state conditionsAl-Si alloysThe main purpose of this paper is to investigate both the columnar to equiaxed transition and primary dendritic arm spacings of Al-3wt.%Si alloy during the horizontal directional solidification. The transient heat transfer coefficient at the metal-mold interface is calculated based on comparisons between the experimental thermal profiles in castings and the simulations provided by a finite difference heat flow program. Simulated curve of the interfacial heat transfer coefficient was used in another numerical solidification model to determine theoretical values of tip growth rates, cooling rates and thermal gradients that are associated with both columnar to equiaxed transition and primary dendritic arm spacings. A good agreement was observed between the experimental values of these thermal variables and those numerically simulated for the alloy examined. A comparative analysis is carried out between the experimental data of this work and theoretical models from the literature that have been proposed to predict the primary dendritic spacings. In this context, this study may contribute to the understanding of how to manage solidification operational parameters aiming at designing the microstructure of Al-Si alloys.ABM, ABC, ABPol2013-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026Materials Research v.16 n.4 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000072info:eu-repo/semantics/openAccessCarvalho,Diego BritoGuimarães,Emanuelle CassebMoreira,Antonio LucianoMoutinho,Daniel JoaquimDias Filho,José MarcelinoRocha,Otávio Lima daeng2013-08-02T00:00:00Zoai:scielo:S1516-14392013000400026Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-08-02T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
title |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
spellingShingle |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification Carvalho,Diego Brito columnar to equiaxed transition primary dendritic spacing directional solidification unsteady-state conditions Al-Si alloys |
title_short |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
title_full |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
title_fullStr |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
title_full_unstemmed |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
title_sort |
Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification |
author |
Carvalho,Diego Brito |
author_facet |
Carvalho,Diego Brito Guimarães,Emanuelle Casseb Moreira,Antonio Luciano Moutinho,Daniel Joaquim Dias Filho,José Marcelino Rocha,Otávio Lima da |
author_role |
author |
author2 |
Guimarães,Emanuelle Casseb Moreira,Antonio Luciano Moutinho,Daniel Joaquim Dias Filho,José Marcelino Rocha,Otávio Lima da |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Carvalho,Diego Brito Guimarães,Emanuelle Casseb Moreira,Antonio Luciano Moutinho,Daniel Joaquim Dias Filho,José Marcelino Rocha,Otávio Lima da |
dc.subject.por.fl_str_mv |
columnar to equiaxed transition primary dendritic spacing directional solidification unsteady-state conditions Al-Si alloys |
topic |
columnar to equiaxed transition primary dendritic spacing directional solidification unsteady-state conditions Al-Si alloys |
description |
The main purpose of this paper is to investigate both the columnar to equiaxed transition and primary dendritic arm spacings of Al-3wt.%Si alloy during the horizontal directional solidification. The transient heat transfer coefficient at the metal-mold interface is calculated based on comparisons between the experimental thermal profiles in castings and the simulations provided by a finite difference heat flow program. Simulated curve of the interfacial heat transfer coefficient was used in another numerical solidification model to determine theoretical values of tip growth rates, cooling rates and thermal gradients that are associated with both columnar to equiaxed transition and primary dendritic arm spacings. A good agreement was observed between the experimental values of these thermal variables and those numerically simulated for the alloy examined. A comparative analysis is carried out between the experimental data of this work and theoretical models from the literature that have been proposed to predict the primary dendritic spacings. In this context, this study may contribute to the understanding of how to manage solidification operational parameters aiming at designing the microstructure of Al-Si alloys. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392013005000072 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.16 n.4 2013 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212662913269760 |