Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification
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 be...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2013-05-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026&tlng=en |
| _version_ | 1818979085756399616 |
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| author | Diego Brito Carvalho Emanuelle Casseb Guimarães Antonio Luciano Moreira Daniel Joaquim Moutinho José Marcelino Dias Filho Otávio Lima da Rocha |
| author_facet | Diego Brito Carvalho Emanuelle Casseb Guimarães Antonio Luciano Moreira Daniel Joaquim Moutinho José Marcelino Dias Filho Otávio Lima da Rocha |
| author_sort | Diego Brito Carvalho |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-20T16:53:56Z |
| format | Article |
| id | doaj.art-753a982323cc401b9118d11791a93db0 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-20T16:53:56Z |
| publishDate | 2013-05-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-753a982323cc401b9118d11791a93db02022-12-21T19:32:47ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392013-05-0116487488310.1590/S1516-14392013005000072Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidificationDiego Brito Carvalho0Emanuelle Casseb Guimarães1Antonio Luciano Moreira2Daniel Joaquim Moutinho3José Marcelino Dias Filho4Otávio Lima da Rocha5Universidade Federal do ParáUniversidade Federal do ParáUniversidade Federal do ParáUniversidade Federal do ParáInstituto Federal do ParáInstituto Federal do ParáThe 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026&tlng=encolumnar to equiaxed transitionprimary dendritic spacingdirectional solidificationunsteady-state conditionsAl-Si alloys |
| spellingShingle | Diego Brito Carvalho Emanuelle Casseb Guimarães Antonio Luciano Moreira Daniel Joaquim Moutinho José Marcelino Dias Filho Otávio Lima da Rocha Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification Materials Research columnar to equiaxed transition primary dendritic spacing directional solidification unsteady-state conditions Al-Si alloys |
| title | 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_short | 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 |
| topic | columnar to equiaxed transition primary dendritic spacing directional solidification unsteady-state conditions Al-Si alloys |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400026&tlng=en |
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