Abstract
The thermal-solute behavior of the mould-metal system during solidification is governed by the thermal gradient, the speed of the interface's progress and by the composition of the alloy. These factors influence the segregation, porosity, grain size and cellular and/or dendritic spacing resulting in the characteristics of the mechanical properties of a smelted or cast piece. This work aims to analyze the microstructural behavior of the Sn-Pb system diluted in the flat, cellular and dendritic zones, in samples obtained by unidirectional growth. The alloys used were concentrations of Sn- 0.05; 1; 4; 38.1 %wt Pb, the thermal gradient varied in the range of 1.3-2.6 K/mm and speeds of 0.38-30 {mu} m/s. A Bridgman furnace was used for the experiences developed in the growth zone given. Metallographic techniques were used to determine the morphology and dimensional characterization of the test pieces. Quantitative relationships were obtained that describe the system's behavior in different growth stages and the morphological transitions that are produced between stages were studied. The primary cellular spacing ({lambda} 1) as well as the dendritic spacing decreased with the increase in speed. However, at the start of the cellular-dendritic transition zone, an increase in the primary spacing ({lambda} 1) was noted
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Ochoa, Herman;
[1]
Fornaro, Osvaldo;
Biloni, Heraldo;
[2]
Bustos, Oscar;
Schulz, Bernd
[3]
- Departamento de Ingenieria Mecanica, Universidad de Antofagasta, Antofagasta (Chile)
- IFIMAT-CIC, UNICEN (Argentina)
- Departamento de Ingenieria Metalurgica, Universidad de Santiago de Chile, Santiago (Chile)
Citation Formats
Ochoa, Herman, Fornaro, Osvaldo, Biloni, Heraldo, Bustos, Oscar, and Schulz, Bernd.
Microstructures of Sn-Pb alloys diluted during unidirectional solidification; Microestructura de aleaciones Sn-Pb diluidas durante la solidificacion unidireccional.
Chile: N. p.,
2006.
Web.
Ochoa, Herman, Fornaro, Osvaldo, Biloni, Heraldo, Bustos, Oscar, & Schulz, Bernd.
Microstructures of Sn-Pb alloys diluted during unidirectional solidification; Microestructura de aleaciones Sn-Pb diluidas durante la solidificacion unidireccional.
Chile.
Ochoa, Herman, Fornaro, Osvaldo, Biloni, Heraldo, Bustos, Oscar, and Schulz, Bernd.
2006.
"Microstructures of Sn-Pb alloys diluted during unidirectional solidification; Microestructura de aleaciones Sn-Pb diluidas durante la solidificacion unidireccional."
Chile.
@misc{etde_20927044,
title = {Microstructures of Sn-Pb alloys diluted during unidirectional solidification; Microestructura de aleaciones Sn-Pb diluidas durante la solidificacion unidireccional}
author = {Ochoa, Herman, Fornaro, Osvaldo, Biloni, Heraldo, Bustos, Oscar, and Schulz, Bernd}
abstractNote = {The thermal-solute behavior of the mould-metal system during solidification is governed by the thermal gradient, the speed of the interface's progress and by the composition of the alloy. These factors influence the segregation, porosity, grain size and cellular and/or dendritic spacing resulting in the characteristics of the mechanical properties of a smelted or cast piece. This work aims to analyze the microstructural behavior of the Sn-Pb system diluted in the flat, cellular and dendritic zones, in samples obtained by unidirectional growth. The alloys used were concentrations of Sn- 0.05; 1; 4; 38.1 %wt Pb, the thermal gradient varied in the range of 1.3-2.6 K/mm and speeds of 0.38-30 {mu} m/s. A Bridgman furnace was used for the experiences developed in the growth zone given. Metallographic techniques were used to determine the morphology and dimensional characterization of the test pieces. Quantitative relationships were obtained that describe the system's behavior in different growth stages and the morphological transitions that are produced between stages were studied. The primary cellular spacing ({lambda} 1) as well as the dendritic spacing decreased with the increase in speed. However, at the start of the cellular-dendritic transition zone, an increase in the primary spacing ({lambda} 1) was noted , basically related to morphological irregularities in the disordered cells zone (CW)}
place = {Chile}
year = {2006}
month = {Dec}
}
title = {Microstructures of Sn-Pb alloys diluted during unidirectional solidification; Microestructura de aleaciones Sn-Pb diluidas durante la solidificacion unidireccional}
author = {Ochoa, Herman, Fornaro, Osvaldo, Biloni, Heraldo, Bustos, Oscar, and Schulz, Bernd}
abstractNote = {The thermal-solute behavior of the mould-metal system during solidification is governed by the thermal gradient, the speed of the interface's progress and by the composition of the alloy. These factors influence the segregation, porosity, grain size and cellular and/or dendritic spacing resulting in the characteristics of the mechanical properties of a smelted or cast piece. This work aims to analyze the microstructural behavior of the Sn-Pb system diluted in the flat, cellular and dendritic zones, in samples obtained by unidirectional growth. The alloys used were concentrations of Sn- 0.05; 1; 4; 38.1 %wt Pb, the thermal gradient varied in the range of 1.3-2.6 K/mm and speeds of 0.38-30 {mu} m/s. A Bridgman furnace was used for the experiences developed in the growth zone given. Metallographic techniques were used to determine the morphology and dimensional characterization of the test pieces. Quantitative relationships were obtained that describe the system's behavior in different growth stages and the morphological transitions that are produced between stages were studied. The primary cellular spacing ({lambda} 1) as well as the dendritic spacing decreased with the increase in speed. However, at the start of the cellular-dendritic transition zone, an increase in the primary spacing ({lambda} 1) was noted , basically related to morphological irregularities in the disordered cells zone (CW)}
place = {Chile}
year = {2006}
month = {Dec}
}