Brass
Mostrando 1-12 de 108 artigos, teses e dissertações.
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1. Indirect estimation of infant mortality in small areas*
Resumo Métodos indiretos do tipo Brass para estimar a mortalidade nas primeiras idades da vida têm sido usados por mais de quatro décadas, fornecendo estimativas muito robustas para países que não possuem sistemas confiáveis de estatísticas vitais. No entanto, quando as áreas de estimativa são pequenas, o número de crianças mortas pode ser muito b
Rev. bras. estud. popul.. Publicado em: 10/01/2020
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2. Post-elastic Deformation Characteristics of Hybrid Fibre Reinforced Concrete Composites
Abstract The present study was focused on evaluating the strength and failure properties of hybrid micro-fibre concretes containing micro brass and steel fibre additions. Experimental tests were conducted on different hybrid fibre concretes containing aligned fibres in the direction of beam axis and the relative mechanical performance was compared to randoml
Lat. Am. j. solids struct.. Publicado em: 10/01/2020
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3. Aplicações da arqueometria no mobiliário de São Paulo do século XVIII: análises indiciárias e contextualização histórica
RESUMO Neste artigo, são apresentados os resultados dos exames arqueométricos de Física aplicada sobre duas peças de mobiliário do acervo do Museu Paulista, uma arca-cofre e uma cadeira de couro de sola feitas por volta do século XVIII. As técnicas de análise utilizadas foram o ED-XRF e o imageamento com fluorescência de luz ultravioleta. As anális
An. mus. paul.. Publicado em: 05/12/2019
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4. HYSTERESIS AND THERMAL INERTIA OF SPHERES OF ALTERNATIVE MATERIALS FOR BLACK GLOBE THERMOMETERS
ABSTRACT This research was conducted with the objective of evaluating the thermal inertia and hysteresis of the following materials in a wind tunnel: hollow copper sphere with 150.0 mm diameter used as standard in globe thermometers, hollow brass sphere with 75.0 mm diameter, and two hollow plastic spheres with 115.5 and 69.7 mm diameter. The results showed
Eng. Agríc.. Publicado em: 04/11/2019
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5. Crystallographic texture and microtexture of copper drawn at 295 K and 77 K
ABSTRACT The pure copper wires were wiredrawn at cryogenic and room temperatures. After deformation they presented important and significant differences in their crystallographic textures and microstructures. Therefore, this study aimed to investigate the evolution of crystallographic texture of pure copper drawn at temperatures of 295 K and 77 K and correla
Matéria (Rio J.). Publicado em: 16/09/2019
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6. Effect of Welding Heat Input on the Microstructure and Mechanical Properties of Dissimilar Friction Stir-Welded Copper/Brass Lap Joint
Dissimilar lap welded joints of copper and brass metals were fabricated by friction stir welding (FSW) method at various welding heat inputs. The effect of welding heat inputs on the microstructure and mechanical properties of overlap welded joints at at two different join configurations (i.e. Advancing side and Retreating side joint configurations) was inve
Mat. Res.. Publicado em: 26/08/2019
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7. Effect of Electric Pulse Treatment on the Corrosion Resistance of HAl52-2 Aluminum Brass
In this work, the effects of electric pulse treatment (EPT) on the corrosion resistance of HAl52-2 aluminum brass has been investigated using electrochemical workstation, scanning electron microscope and X-ray diffraction. The results have shown that after EPT, the corrosion potential increased and the corrosion current density decreased. At the same time, t
Mat. Res.. Publicado em: 19/08/2019
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8. Microstructure and Properties of Duplex Ni-P-TiO2/Ni-P Nanocomposite Coatings
Duplex Ni-P-TiO2/Ni-P coatings were electrodeposited onto brass substrates. High phosphorus Ni-P coatings were plated as the inner layer to improve the corrosion resistance, while low phosphorus sol-enhanced Ni-P-TiO2 coatings were deposited on the top to strengthen the mechanical property. The microstructure, morphology, mechanical property and corrosion re
Mat. Res.. Publicado em: 13/06/2019
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9. Performance and Surface Integrity of Wire Electrical Discharge Machining of Thin Ti6al4v Plate Using Coated and Uncoated Wires
Wire Electrical Discharge Machining (WEDM) is one of the most important production technologies to manufacture very accurate small components and tools on any electrical conductive material. Titanium and its alloys have been widely used in automobile and aerospace industry as well as in medical engineering field. Small components and tools with complex geome
Mat. Res.. Publicado em: 03/06/2019
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10. Aplicação da técnica P/F de Brass em um contexto de rápida queda da fecundidade adolescente
Resumo O Brasil experimentou, entre 2000 e 2010, pela primeira vez desde 1970, quando se introduziu o quesito sobre filhos nascidos vivos nos 12 meses anteriores à data de referência do censo, queda significativa (em torno de 30%) das taxas específicas de fecundidade declarada das mulheres entre 15 e 19 anos (f*1). Esse fenômeno tem uma importante conseq
Rev. bras. estud. popul.. Publicado em: 14/11/2018
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11. Recuperação anestésica assistida por corda em três pontos em equinos
RESUMO: Neste estudo foi avaliado a qualidade da recuperação anestésica de equinos através do método de recuperação assistida por três pontos. Sessenta e oito cavalos (37 fêmeas e 31 machos) de diferentes raças, idade e peso foram submetidos à anestesia geral para cirurgias abdominais - ABD (n=15), artroscopias - ART (n=17), demais cirurgias orto
Cienc. Rural. Publicado em: 14/11/2018
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12. Experimental study of brass properties through perforation tests using a thermal chamber for elevated temperatures
Abstract Experimental analysis on standard brass alloy has been carried out using a high pressure gas gun. Perforation tests have been performed for a variety of impact velocities from 40 to 120 m/s in order to study the material behaviour and to define failure modes. The main aim of the study has been to provide results using an innovative thermal chamber t
Lat. Am. j. solids struct.. Publicado em: 22/10/2018