128 resultados para Transformações de fase (Física estatística)

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


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Pós-graduação em Engenharia Mecânica - FEG

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Pós-graduação em Física - IFT

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Pós-graduação em Física - IFT

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Física - IFT

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Pós-graduação em Física - IFT

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New classes of martensitic stainless steels, with low carbon levels, have been developed aiming to meet the needs of the petroleum industry segment. However, their use has been restricted due to the fact it is a recent development and many of its properties are still under investigation. This work determines the values of initial and final temperatures for the austenitic transformation and the initial and final temperatures of martensitic formation for alloy 13Cr2Ni0,1C, by means of dilatometric tests under continuous cooling. Based on these results the optimized conditions for quench and temper heat treatments were obtained. The microstructural characterization of the alloys under coarse fusion condition was carried out by optical microscopy and the presence of delta-ferrite in the martensitic matrix was observed.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Facing the mechanical model that dominated the schools from the end of the 19th century to the 1970s, new movements for the Physical Education emerged during the 1980s. These movements aimed at breaking up with the military concept of sport that reigned so far. This way we assign a historical period marked by significant transformations in Brazilian Physical Education, especially in school, and they are related to the raise of new school proposals, such as: the developmentist, the constructivist and the critical-overcomer. All this considered, the present paper aims at analyzing if these tendencies really influenced the pedagogical practice of a group of Physical Education teachers in public schools of Serra Negra, SP.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)