Columnar To Equiaxed Transition
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Resistencia a la corrosión de aleaciones Al-Cu en biodiesel
ABSTRACT The aim of the present work was to evaluate the susceptibility to corrosion in biodiesel of Al-Cu alloys directionally solidified: Al-4.5wt.%Cu and Al-15wt.% Cu, in function of the type of structure (columnar, equiaxed or columnar-to-equiaxed transition - CET) and chemical composition. Working electrodes were prepared with different types of alloy s
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Transient Directional Solidification of Cast Iron: Microstructure Formation, Columnar to Equiaxed Transition and Hardness
A number of applications may require cast iron. Engine cylinder blocks, flywheels, gearbox cases, machine-tool bases may be manufactured by using grey cast iron while bearing surfaces with white cast iron. Thus, understanding the solidification behaviour of eutectic cast iron becomes an essential task, with certain points to be accomplished. Transient direct
Mat. Res.. Publicado em: 31/05/2016
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3. On the Natural Convection in the Columnar to Equiaxed Transition in Directionally Solidified Aluminum-based Binary and Multicomponent Alloys
In order to investigate the effect of natural convection in columnar to equiaxed transition (CET), Al-3.0wt.%Cu and Al-3.0wt.%Cu-5.5wt.%Si alloys ingots were obtained during the transient horizontal directional solidification (THDS). Aiming to analyze the effect of superheat in the formation of the macrostructure in ternary Al-Cu-Si alloy, the experiments we
Mat. Res.. Publicado em: 04/12/2015
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4. The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys
Experiments were conducted to investigate the influence of thermal parameters on the columnar to equiaxed transition during the horizontal unsteady-state directional solidification of Al-Si alloys. The parameters analyzed include the heat transfer coefficients, growth rates, cooling rates, temperature gradients and composition. A combined theoretical and exp
Mat. Res.. Publicado em: 18/02/2014
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5. Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification
The main purpose of this paper is to investigate both the columnar to equiaxed transition and primary dendritic arm spacings of Al-3wt.%Si alloy during the horizontal directional solidification. The transient heat transfer coefficient at the metal-mold interface is calculated based on comparisons between the experimental thermal profiles in castings and the
Mat. Res.. Publicado em: 14/05/2013
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6. Effect of inoculation on the grain macrostructure of Al-Si alloys obtained by unidirectional solidification. / Efeito da inoculação na macroestrutura de grãos de ligas AI-Si obtidas por solidificação unidirecional.
The development of various industrial sectors, such as the automotive and the aerospace industry, demand premium aluminum castings with strict control of mechanical properties. To fulfill these requirements, the control of solidification processes and the knowledge of relations between the processing variables and the casting properties are necessary. The me
Publicado em: 2009
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7. Análise da solidificação de ligas de magnésio para aplicação na fabricação de motores
Magnésio e suas ligas têm adquirido importância cada vez mais significativa como material estrutural de peso leve despertando um singular interesse pela indústria uma vez que oferece a melhor relação peso/resistência entre os metais. Os campos mais conhecidos de sua aplicação consistem na construção de veículos, na aeronáutica, manipulação ind
Publicado em: 2009
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8. Influencia de parametros termicos de solidificação na transição colunar/equiaxial
The macroestructure of cast ingots can be characterized by either a completely columnar structure or an equiaxed structure, depending on alloy composition and solidification conditions. A more complex structure, typical of solidification in molds of high heat diffusivity, like chill and cooled molds, both structural forms. This mixed mode of solidification o
Publicado em: 2002