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Artículo

An experimental investigation of the columnar-to-equiaxed grain transition in aluminumcopper hypoeutectic and eutectic alloys

Ares, Alicia EstherIcon ; Gueijman, Sergio Fabian; Schvezov, Carlos EnriqueIcon
Fecha de publicación: 24/07/2010
Editorial: Elsevier Science
Revista: Journal of Crystal Growth
ISSN: 0022-0248
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Recubrimientos y Películas

Resumen

Providing benchmark data of the thermal and metallographic parameters during the columnar-to-equiaxed transition (CET) in a wide range of alloy concentrations is of fundamental importance for understanding this phenomenon as well as for metallurgical and modeling purposes. The aim of this study was to investigate the columnar-to-equiaxed transition (CET) in aluminumcopper alloys of different compositions covering a wide range from 2 to 33.2 wt%Cu (eutectic composition), which were directionally solidified from a chill face. The thermal parameters studied included recalescence, cooling rates, temperature gradients and interphase velocities. We found that the temperature gradient and velocity of the liquidus interphase reached critical values at the CET; these critical values were between -0.44 and 0.09 K/mm and between 0.67 and 2.16 mm/s, respectively. The metallographic parameters analyzed were grain size, primary and secondary dendritic arm spacing and also eutectic spacing. The results obtained were compared with previous experimental studies, published predictions and models of the CET for similar alloys.
Palabras clave: A1. Columnar to Equiaxed Transition , A1. Dendrites , A1. Directional Solidification , A1. Interphases , A2. Growth from Melt , B1. Alloys
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/58641
URL: https://www.sciencedirect.com/science/article/pii/S0022024810002848
DOI: https://doi.org/10.1016/j.jcrysgro.2010.04.040
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Articulos(CCT - NORDESTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NORDESTE
Citación
Ares, Alicia Esther; Gueijman, Sergio Fabian; Schvezov, Carlos Enrique; An experimental investigation of the columnar-to-equiaxed grain transition in aluminumcopper hypoeutectic and eutectic alloys; Elsevier Science; Journal of Crystal Growth; 312; 14; 24-7-2010; 2154-2170
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