Austempered Ductile Iron
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Estudio del comportamiento de fundición CADI sometida a FCR
ABSTRACT Ductile Iron (DI) is a development of the iron alloys introduced in the ´50s, with free graphite in the form of nodules. Austempered Ductile Iron (ADI) is a development of DI later introduced, consisting on austempering heat treatment in order to obtain a high strength and high toughness material. Carbidic Austempered Ductile Iron (CADI) is a more
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Design of the austempering heat treatment of a ductile iron differential case aided by computer simulation
Abstract Austempered ductile iron is frequently employed in the fabrication of automobile parts due to its good mechanical properties, and its simplicity and low cost of the manufacturing process. The heat treatment design is an important stage, in which parameters such as temperatures and durations are chosen according to the required microstructure, part
Lat. Am. j. solids struct.. Publicado em: 02/07/2018
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3. Influence of casting heterogeneities on microstructure and mechanical properties of austempered ductile iron (ADI)
ABSTRACT An investigation was carried out to examine the influence of as-cast heterogeneities on the resulting microstructure and mechanical properties of an austempered ductile cast iron (ADI). A commercial hypereutectic ductile iron alloy with 3.59% C, 2.68% Si, 0.24% Mn and 0.46% Cu (in wt. %) was produced in a coreless induction furnace. The specimens we
Matéria (Rio J.). Publicado em: 10/08/2017
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4. Tratamento térmico de austêmpera em ferro fundido nodular com adições de nióbio e de cromo
RESUMO O ferro nodular austemperado (ADI) é indicado para aplicações que demandam alta resistência ao desgaste abrasivo. Uma de suas variações é o CADI (Carbidic Austempered Ductile Iron), que contém em sua microestrutura carbonetos eutéticos livres. A adição de nióbio em ferro nodular também resulta em formação de carbonetos, porém mais duro
Matéria (Rio J.). Publicado em: 22/06/2017
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5. Quenching and partitioning heat treatment in ductile cast irons
A commercial ductile iron alloy was submitted to a quenching and partitioning heat treatment. Samples were austenitized at 900 ºC for two hours, quenched at 160 ºC and kept at this temperature for 2 minutes and finally were re-heated at temperatures between 300 and 450 ºC during time intervals between 2 and 180 minutes. The microstructural evaluation was
Mat. Res.. Publicado em: 26/10/2014
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6. An analysis of the machinability of ASTM grades 2 and 3 austempered ductile iron
Austempered Ductile Iron (ADI) is a ferrous material that was first fabricated in the second half of last century, therefore a relatively new material compared to steel, which has been used for different applications by mankind for some millennia now. ADI ;s mechanical properties, such as its strength-to-weight ratio, which has proven to outperform that of f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
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7. Simulação computacional do roleteamento de eixo virabrequim de compressor monocilíndrico de ferro fundido nodular austemperado
Simulou-se o roleteamento de um eixo virabrequim fabricado em ferro fundido nodular austemperado, conhecido como ADI (Austempered Ductile Iron), utilizando o método de elementos finitos, através do software Deform 3DTM. O roleteamento é um tratamento usado em peças de aço e ferro fundido em regiões de concentração de tensão, a fim de melhorar as pro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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8. Avaliação da tenacidade à fratura em ferro fundido nodular austemperado classe 65-45-12
O objetivo deste trabalho foi avaliar o desempenho de três condições de austêmpera para uma liga de ferro fundido nodular 65-45-12 austêmperada, em relação à tenacidade à fratura (KIC), correlacionando às propriedades mecânicas e metalúrgicas obtidas em cada condição de tratamento térmico ensaiadas. Para tanto, foi necessário a confecção de
Publicado em: 2011
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9. Análise de manufatura e de produto para a utilização do ferro fundido austemperado ADI grau 3 em eixo comando de válvulas de motores Diesel / Product and manufacturing analysis of austempered ductile iron ADI grade 3 using for Diesel engine camshaft
The austempered ductile iron grade 3 was investigated as a substitute to SAE 1045 forged steel quenched &tempered in Diesel engines camshaft application. The mechanical properties for both materials were compared in laboratory tests and in the literature. The main mechanical property studied was the wear resistance. The microstructure, chemical composition w
Publicado em: 2010
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10. Mechanisms of fracture of austempered ductile iron from the critical zone / Mecanismos de fratura de ferro fundido nodular austemperado a partir da zona crítica
Este trabalho faz parte de uma linha de pesquisa executada na UDESC, que visa entender e comparar o processo de fratura dos ADI duais, tais como, locais de concentração de deformação plástica e de nucleação de trincas, e caminhos de propagação de trinca. Os mecanismos de fratura de dois tipos de ADI duais com diferente fração volumétrica de ausfe
Publicado em: 2010
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11. Influência da deformação superficial induzida na resistência à fadiga do ferro fundido nodular austemperado
The austempered ductile iron (ADI) is stronger, lighter and cheaper than forged carbon steels. In addition, ADI displays a higher ductility, toughness and resistance to wear than other cast irons. This work presents an analysis of the effect of induced superficial deformation on the fatigue resistance of ADI and it was studied the possibility to reduce the t
Publicado em: 2010
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12. Furação de ferros fundidos austemperados e nodular perlítico / Machinability of Austempered Ductile Irons and Pearlitic Ductile Iron in Drilling Process
Many materials have mechanical proprieties improved by heat treatments, but this can cause changes in the structure of the material, worsening its machinability, as in the case of austempered ductile iron (ADI) that despite of presenting better mechanical proprieties it has lower machinability when compared with the conventional ductile iron and steel of sim
Publicado em: 2009