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Type: Artigo de periódico
Title: Macro- and microstructure analysis of SSM A356 produced by electromagnetic stirring
Author: Zoqui, EJ
Paes, A
Es-Sadiqi, E
Abstract: The objective of this work is to present the relationship between macro- and microstructure of the rheocast alloy A356 obtained by electromagnetic stirring. There is a direct relationship between grain size (macrostructure) and globule size/shape factor (microstructure): the smaller the grain size, the smaller are the globule size and shape factor. The A356 alloy was processed in a simple device, which constitutes a semi-continuous casting system, coupled with a power source. The A356 (Al-7.0 wt.%Si) alloy was electromagnetically stirred under different cooling rates (controlled by the casting speed of 1 and 3 cm/s) and different power levels (600-1200 W). Ingots with 45 mm of diameter and 3 kg with very refined and homogeneous rheocast structures were obtained. The direct relationship between macro- and microstructures of the ingots were exploited. A quality index is proposed to better characterise the rheocast structure. (C) 2002 Elsevier Science B.V. All rights reserved.
Subject: rheocast
aluminium-silicon alloys
electromagnetic stirring
Country: Suíça
Editor: Elsevier Science Sa
Rights: fechado
Identifier DOI: 10.1016/S0924-0136(01)01148-7
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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