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Type: Artigo de periódico
Title: Contribution to the study of mechanisms involved in the formation of rheocast structure
Author: Zoqui, EJ
Robert, MH
Abstract: The work presents some results obtained when producing rheocast structures of Al-(4.5wt.%)Cu alloys, by heat treatment of dendritic material tin as-cast and cold deformed conditions) at temperature above solidus. Macro and microstructures were analysed in order to investigate the evolution mechanisms involved in the structure modifications. Results show that coarsening and coalescence phenomena can lead to a significant difference between the sizes of grain and globule, therefore being necessary to distinguish between micro and macroconstituents. Results also show that, for deformed dendritic structure, a phenomenon of recrystallisation plus boundaries wetting leads to structures where one globule of the primary phase corresponds to one grain in the macrostructure. (C) 2001 Elsevier Science B.V. All rights reserved.
Subject: semi-solid material
semi-solid alloy
rheocast structure
Country: Suíça
Editor: Elsevier Science Sa
Rights: fechado
Identifier DOI: 10.1016/S0924-0136(00)00798-6
Date Issue: 2001
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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