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Dive into the research topics where José Maria do Vale Quaresma is active.

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Featured researches published by José Maria do Vale Quaresma.


Journal of Materials Processing Technology | 2003

Mechanical properties as a function of thermal parameters and microstructure of Zn–Al castings

Wislei R. Osório; Carlos A. Q. Santos; José Maria do Vale Quaresma; Amauri Garcia

Abstract The imposition of a wide range of operational conditions in foundry and casting process generates, as a direct consequence, a diversity of solidification structures. Structural parameters such as grain size and interdendritic spacings are highly influenced by thermal behavior of the metal/mould system during solidification, consequently imposing a close correlation between the described system and the resulting microstructure. The mechanical properties of an alloy depend on the solidification microstructural arrangement. Under this circumstance, grain size, interdendritic spacings, casual porosities, segregated products and other phases will define the mechanical behavior of the alloy, represented by stresses and/or strains. Expressions correlating the mechanical behavior with microstructure parameters are very useful for a previous planning of the solidification conditions in terms of a determined level of mechanical resistance which is intended to be attained, i.e. to settle a way of programming the microstructure and the mechanical properties as well. Particularly, the literature in this field presents relationships between the material yield strength and the grain size, such as the Hall–Petch’s equation. The aim of the present work is to investigate the influence of heat transfer on solidification microstructure of Zn–Al alloys and the correlation with mechanical properties. Experimental results include transient metal/mould heat transfer coefficients, secondary dendrite arm spacings and ultimate and yield strengths as a function of solidification conditions imposed by the metal/mould system.


Inverse Problems in Science and Engineering | 2004

Metal–mold heat transfer coefficients during horizontal and vertical Unsteady-State solidification of Al–Cu and Sn–Pb Alloys

Carlos A. Q. Santos; Cláudio Alves Siqueira; Amauri Garcia; José Maria do Vale Quaresma; Jaime A. Spim

In this work, metal–mold heat transfer coefficients (h) are determined during unidirectional solidification of Al–Cu and Sn–Pb alloys. The effects of casting assembly (horizontal and vertical), alloy composition, material and thickness of the mold and melt superheat are investigated. By using measured temperatures in both casting and metal, together with numerical solutions of the solidification problem, metal–mold heat transfer coefficients are quantified based on solution of the inverse heat conduction problem. Experimental temperatures are compared with simulations furnished by an explicit finite difference numerical model, and an automatic search selects the best theoretical–experimental fitting from a range of values of metal–mold heat transfer coefficients. Experiments were conducted to analyze the evolution of h during solidification of Al–2, 4.5, 5, 8, 10, 15, 33 wt% Cu alloys and Sn–5, 10, 15, 20, 30, 39 wt% Pb in horizontal and vertical steel chills. The results permitted the establishment of expressions as a power function of time, for different alloy compositions, casting assembly material and thickness of the mold and melt superheat.


72º Congresso Anual da ABM | 2017

ESTUDO DO EFEITO DA DEFOMABILIDADE NA LIGA Al-0,05%Cu-[0,35-0,45]%Fe-0,22%Zr EM FORMATO DE CHAPAS

Everaldo Afonso Fernandes; Daniel Rodrigues Oliveira; Raelly Laurinda Araújo da Silva; Carlos Vinicius de Paes Santos; Fabrício Paiva da Silva; José Maria do Vale Quaresma

Raelly Laurinda Araújo da Silva Carlos Vinicius de Paes Santos Fabrício Paiva da Silva Daniel Rodrigues Oliveira Everaldo Afonso Fernandes José Maria do Vale Quaresma Resumo O cenário tecnológico brasileiro passa por transformações profundas, a indústria em geral faz parte desse panorama, dentro dos segmentos indústrias temos a automobilística, onde novas tecnologias são apresentadas e as demais aprimoradas, nesse segmento temos as ligas não ferrosas de alumínio, que com adição de elementos de liga se transformam em ligas de alta performance, assim como as ligas de aços. Elementos de maquinas de ligas de alumínio sofrem modificações em suas propriedades mecânicas com a variação de temperaturas, deformação, composição química entre outras. O presente trabalho objetiva a comparação das propriedades mecânicas dos resultados experimentais da liga Al-0,05%Cu-[0,35-0,45] %Fe-0,22%Zr e de simulações computacionais de chapas para aplicação na indústria automotiva. A liga foi obtida a partir do Al-EC modificado por inserções de ferro na faixa de [0,35 0,45] % e 0,22%Zr. Posteriormente, após a solidificação da liga em molde unidirecional horizontal, os lingotes foram transformados em perfis de 3,0mm e submetidos a ensaios mecânico de tração. Na parte de simulação computacional as propriedades mecânicas foram medidas usando chapas finas de aço e chapas mas espessas de alumínio, as propriedades obtidas nos ensaios reais, foram utilizadas como paramentos das simulações das chapas de alumínio, objetivamente a comparação das propriedades mecânicas com os resultados experimentais da liga estuda. Os resultados dessas análises permitem avaliar que a liga Al-0,05%Cu-[0,35-0,45] %Fe-0,22%Zr pode ser aplicada em componentes estruturais na indústria automotiva que trabalharem estaticamente na forma de fuselagem de automóveis de passeio ou veículos de trabalho com boas propriedades mecânicas. Palavras-chave: Liga Al-Zr; Tratamento térmico; Propriedades mecânicas; Simulação computacional.


Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2000

Correlation between unsteady-state solidification conditions, dendrite spacings, and mechanical properties of Al-Cu alloys

José Maria do Vale Quaresma; Carlos A. Q. Santos; Amauri Garcia


Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2010

Dendritic Arm Spacing Affecting Mechanical Properties and Wear Behavior of Al-Sn and Al-Si Alloys Directionally Solidified under Unsteady-State Conditions

Kleber S. Cruz; Elisangela S. Meza; Frederico Augusto Pires Fernandes; José Maria do Vale Quaresma; Luiz Carlos Casteletti; Amauri Garcia


International Journal of Heat and Mass Transfer | 2009

Interfacial heat transfer coefficients and solidification of an aluminum alloy in a rotary continuous caster

Noé Cheung; Newton Silva Santos; José Maria do Vale Quaresma; George S. Dulikravich; Amauri Garcia


Materials & Design | 2009

Melt characteristics and solidification growth direction with respect to gravity affecting the interfacial heat transfer coefficient of chill castings

Noé Cheung; Ivaldo L. Ferreira; Moisés M. Pariona; José Maria do Vale Quaresma; Amauri Garcia


International Journal of Thermal Sciences | 2012

Design of mechanical properties of Al-alloys chill castings based on the metal/mold interfacial heat transfer coefficient

José E. Spinelli; Noé Cheung; Pedro R. Goulart; José Maria do Vale Quaresma; Amauri Garcia


Materials Science and Engineering B-advanced Functional Solid-state Materials | 2014

Plate-like cell growth during directional solidification of a Zn–20wt%Sn high-temperature lead-free solder alloy

Washington L.R. Santos; Crystopher Brito; José Maria do Vale Quaresma; José E. Spinelli; Amauri Garcia


Journal of Alloys and Compounds | 2007

The effect of solidification thermal variables on surface quality of Al–Cu ingots

José Maria do Vale Quaresma; Noé Cheung; Amauri Garcia

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Amauri Garcia

State University of Campinas

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Noé Cheung

State University of Campinas

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Carlos Sousa

Federal University of Pará

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Renan Gouvea Dias

Federal University of Pará

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Carlos A. Q. Santos

Washington University in St. Louis

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José E. Spinelli

Federal University of São Carlos

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