The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys

Detalhes bibliográficos
Autor(a) principal: Rocha,Otávio Lima
Data de Publicação: 2015
Outros Autores: Gomes,Laércio Gouvea, Moutinho,Daniel Joaquim Conceição, Ferreira,Ivaldo Leão, Garcia,Amauri
Tipo de documento: Artigo
Idioma: eng
Título da fonte: REM. Revista Escola de Minas (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100085
Resumo: In this work the columnar to equiaxed transition (CET) was experimentally investigated in the unidirectional solidification of three aluminum based multicomponent alloys (Al-nSi-3Cu), with "n" equal to 5.5, 7.5 and 9 wt.%. The main parameters analyzed include the tip temperature gradient (GL), tip growth rate (VL), tip cooling rate (TR) and Si content. A water-cooled solidification experimental setup was developed, and specimens were solidified under unsteady state heat flow conditions. It is shown that for the alloys examined, the solute concentration influences the position of the CET, which occurs for an average cooling rate of about 1.17 0C/s. A comparative analysis between the results of this work and those from literature proposed to analyze the CET during upward vertical solidification of Al-Si alloys is reported and the results show that the end of the columnar region is abbreviated as a result of seven times higher critical cooling rate than that verified for Al-Si alloys.
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spelling The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloysDirectional solidificationMacrostructuresColumnar/equiaxed transitionAl-Si-Cu alloysIn this work the columnar to equiaxed transition (CET) was experimentally investigated in the unidirectional solidification of three aluminum based multicomponent alloys (Al-nSi-3Cu), with "n" equal to 5.5, 7.5 and 9 wt.%. The main parameters analyzed include the tip temperature gradient (GL), tip growth rate (VL), tip cooling rate (TR) and Si content. A water-cooled solidification experimental setup was developed, and specimens were solidified under unsteady state heat flow conditions. It is shown that for the alloys examined, the solute concentration influences the position of the CET, which occurs for an average cooling rate of about 1.17 0C/s. A comparative analysis between the results of this work and those from literature proposed to analyze the CET during upward vertical solidification of Al-Si alloys is reported and the results show that the end of the columnar region is abbreviated as a result of seven times higher critical cooling rate than that verified for Al-Si alloys.Escola de Minas2015-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100085Rem: Revista Escola de Minas v.68 n.1 2015reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/0370-44672015680237info:eu-repo/semantics/openAccessRocha,Otávio LimaGomes,Laércio GouveaMoutinho,Daniel Joaquim ConceiçãoFerreira,Ivaldo LeãoGarcia,Amaurieng2015-10-09T00:00:00Zoai:scielo:S0370-44672015000100085Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2015-10-09T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse
dc.title.none.fl_str_mv The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
title The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
spellingShingle The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
Rocha,Otávio Lima
Directional solidification
Macrostructures
Columnar/equiaxed transition
Al-Si-Cu alloys
title_short The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
title_full The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
title_fullStr The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
title_full_unstemmed The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
title_sort The columnar to equiaxed transition in the directional solidification of aluminum based multicomponent alloys
author Rocha,Otávio Lima
author_facet Rocha,Otávio Lima
Gomes,Laércio Gouvea
Moutinho,Daniel Joaquim Conceição
Ferreira,Ivaldo Leão
Garcia,Amauri
author_role author
author2 Gomes,Laércio Gouvea
Moutinho,Daniel Joaquim Conceição
Ferreira,Ivaldo Leão
Garcia,Amauri
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rocha,Otávio Lima
Gomes,Laércio Gouvea
Moutinho,Daniel Joaquim Conceição
Ferreira,Ivaldo Leão
Garcia,Amauri
dc.subject.por.fl_str_mv Directional solidification
Macrostructures
Columnar/equiaxed transition
Al-Si-Cu alloys
topic Directional solidification
Macrostructures
Columnar/equiaxed transition
Al-Si-Cu alloys
description In this work the columnar to equiaxed transition (CET) was experimentally investigated in the unidirectional solidification of three aluminum based multicomponent alloys (Al-nSi-3Cu), with "n" equal to 5.5, 7.5 and 9 wt.%. The main parameters analyzed include the tip temperature gradient (GL), tip growth rate (VL), tip cooling rate (TR) and Si content. A water-cooled solidification experimental setup was developed, and specimens were solidified under unsteady state heat flow conditions. It is shown that for the alloys examined, the solute concentration influences the position of the CET, which occurs for an average cooling rate of about 1.17 0C/s. A comparative analysis between the results of this work and those from literature proposed to analyze the CET during upward vertical solidification of Al-Si alloys is reported and the results show that the end of the columnar region is abbreviated as a result of seven times higher critical cooling rate than that verified for Al-Si alloys.
publishDate 2015
dc.date.none.fl_str_mv 2015-03-01
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=S0370-44672015000100085
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672015000100085
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0370-44672015680237
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 Escola de Minas
publisher.none.fl_str_mv Escola de Minas
dc.source.none.fl_str_mv Rem: Revista Escola de Minas v.68 n.1 2015
reponame:REM. Revista Escola de Minas (Online)
instname:Escola de Minas
instacron:ESCOLA DE MINAS
instname_str Escola de Minas
instacron_str ESCOLA DE MINAS
institution ESCOLA DE MINAS
reponame_str REM. Revista Escola de Minas (Online)
collection REM. Revista Escola de Minas (Online)
repository.name.fl_str_mv REM. Revista Escola de Minas (Online) - Escola de Minas
repository.mail.fl_str_mv editor@rem.com.br
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