An Experimental Study of the Influence of Solidification Thermal Variables upon Microstructure of Al-Si-Cu Alloys
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2016
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BRAZILIAN MRS MEETING, 15th
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Resumo
Solidification of metals involves the transformation of the molten metal back into
the solid state. The transformation of a liquid into solid is probably the most
important phase transformation in applications of science and engineering
materials [1, 2]. Solidification structures impact heavily on the products final
characteristics and therefore predict microstructure resulting from the
solidification thermal variables is essential for the programming process using
solidification. The aim of this work is obtain correlations between thermal
solidification variables and the microstructure of Al-10wt%Si-2wt%Cu and
Al-10wt%Si-5wt%Cu alloys. These alloys were solidified under upward unsteady
state heat flow conditions. Heat was directionally extracted only through a watercooled
bottom made of steel (SAE 1020). The results include tip growth rate (VL),
cooling rate (TR) and primary dendrite arm spacing (λ1) as a function of
solidification conditions imposed by the metal/mold system.For both alloys, it is
found that the primary dendrite arm spacing decreases with the increase in tip
growth rate and cooling rate.
Como referenciar
NASCIMENTO, MAURICIO S.; FRANCO, ANTONIO T.R.; NAKAMOTO, FRANCISCO Y.; FRAJUCA, CARLOS; SANTOS, GIVANILDO A. dos; COUTO, ANTONIO A. An Experimental Study of the Influence of Solidification Thermal Variables upon Microstructure of Al-Si-Cu Alloys. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... São Carlos, SP: Aptor Software, 2016. p. 1006-1006. Disponível em: http://repositorio.ipen.br/handle/123456789/28067. Acesso em: 30 Dec 2025.
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