The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys
Experiments were conducted to investigate the influence of thermal parameters on the columnar to equiaxed transition during the horizontal unsteady-state directional solidification of Al-Si alloys. The parameters analyzed include the heat transfer coefficients, growth rates, cooling rates, temperatu...
| Autor principal: | CARVALHO, Diego de Leon Brito |
|---|---|
| Outros Autores: | MOREIRA, Antonio Luciano Seabra, MOUTINHO, Daniel Joaquim da Conceição, DIAS FILHO, José Marcelino da Silva, ROCHA, Otávio Fernandes Lima da, SPINELLI, José Eduardo |
| Grau: | Artigo |
| Idioma: | eng |
| Publicado em: |
2015
|
| Assuntos: | |
| Acesso em linha: |
http://repositorio.ufpa.br/jspui/handle/2011/6998 |
| id |
ir-2011-6998 |
|---|---|
| recordtype |
dspace |
| spelling |
ir-2011-69982017-12-14T13:06:36Z The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys CARVALHO, Diego de Leon Brito MOREIRA, Antonio Luciano Seabra MOUTINHO, Daniel Joaquim da Conceição DIAS FILHO, José Marcelino da Silva ROCHA, Otávio Fernandes Lima da SPINELLI, José Eduardo Colunar equiaxial de transição Solidificação Parâmetros térmicos Condições do estado instável Ligas Al-Si Experiments were conducted to investigate the influence of thermal parameters on the columnar to equiaxed transition during the horizontal unsteady-state directional solidification of Al-Si alloys. The parameters analyzed include the heat transfer coefficients, growth rates, cooling rates, temperature gradients and composition. A combined theoretical and experimental approach is developed to determine the solidification thermal variables considered. The increasing solute content in Al-Si alloys was not found to affect significantly the experimental position of the CET which occurred for cooling rates in the range between 0.35 and 0.64 K/s for any of three alloy compositions examined. A comparative analysis between the results of this work and those from the literature proposed to analyze the CET during upward vertical solidification of Al-Si alloys is reported and the results have shown that the end of the columnar region during horizontal directional solidification is abbreviated as a result of about six times higher thermal gradient than that verified during upward unidirectional solidification of alloys investigated. 2015-11-16T13:13:49Z 2015-11-16T13:13:49Z 2014-04 Artigo de Periódico CARVALHO, Diego de Leon Brito et al. The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys. Materials Research, São Carlos, v. 17, n. 2, p. 498-510, abr. 2014. Disponível em: <http://www.scielo.br/pdf/mr/v17n2/aop_matres_229013.pdf>. Acesso em: 13 nov. 2015. <http://dx.doi.org/10.1590/S1516-14392014005000015>. 1516-1439 http://repositorio.ufpa.br/jspui/handle/2011/6998 eng Acesso Aberto application/pdf |
| institution |
Repositório Institucional - Universidade Federal do Pará |
| collection |
RI-UFPA |
| language |
eng |
| topic |
Colunar equiaxial de transição Solidificação Parâmetros térmicos Condições do estado instável Ligas Al-Si |
| spellingShingle |
Colunar equiaxial de transição Solidificação Parâmetros térmicos Condições do estado instável Ligas Al-Si CARVALHO, Diego de Leon Brito The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys |
| topic_facet |
Colunar equiaxial de transição Solidificação Parâmetros térmicos Condições do estado instável Ligas Al-Si |
| description |
Experiments were conducted to investigate the influence of thermal parameters on the columnar to equiaxed transition during the horizontal unsteady-state directional solidification of Al-Si alloys. The parameters analyzed include the heat transfer coefficients, growth rates, cooling rates, temperature gradients and composition. A combined theoretical and experimental approach is developed to determine the solidification thermal variables considered. The increasing solute content in Al-Si alloys was not found to affect significantly the experimental position of the CET which occurred for cooling rates in the range between 0.35 and 0.64 K/s for any of three alloy compositions examined. A comparative analysis between the results of this work and those from the literature proposed to analyze the CET during upward vertical solidification of Al-Si alloys is reported and the results have shown that the end of the columnar region during horizontal directional solidification is abbreviated as a result of about six times higher thermal gradient than that verified during upward unidirectional solidification of alloys investigated. |
| format |
Artigo |
| author |
CARVALHO, Diego de Leon Brito |
| author2 |
MOREIRA, Antonio Luciano Seabra MOUTINHO, Daniel Joaquim da Conceição DIAS FILHO, José Marcelino da Silva ROCHA, Otávio Fernandes Lima da SPINELLI, José Eduardo |
| author2Str |
MOREIRA, Antonio Luciano Seabra MOUTINHO, Daniel Joaquim da Conceição DIAS FILHO, José Marcelino da Silva ROCHA, Otávio Fernandes Lima da SPINELLI, José Eduardo |
| title |
The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys |
| title_short |
The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys |
| title_full |
The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys |
| title_fullStr |
The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys |
| title_full_unstemmed |
The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys |
| title_sort |
columnar to equiaxed transition of horizontal unsteady-state directionally solidified al-si alloys |
| publishDate |
2015 |
| url |
http://repositorio.ufpa.br/jspui/handle/2011/6998 |
| _version_ |
1832604246421274624 |
| score |
11.755432 |