Mechanical Proprieties
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Heat treatment analysis of ASTM A106 steel spheroidization and erosive wear at high temperatures
Abstract The microstructures of steels are altered when exposed to high working temperatures for long periods, which results in varied physical and chemical proprieties. This study evaluates the erosive wear behavior of ASTM A106 steel after it is exposed to high temperatures for long durations. Samples of normalized ASTM A106GrB steel were placed in a muffl
REM, Int. Eng. J.. Publicado em: 2020-12
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2. Effect of Curing Temperature, Activator Solution Composition and Particle Size in Brazilian Fly-Ash Based Geopolymer Production
The geopolymer binder is a relatively new class of inorganic binding material of elevated mechanical strength and good chemical properties. This can be produced using clay minerals or byproducts of the industrial processes, such as metakaolin, fly-ash and blast furnace slag. In this work, geopolymers were produced by alkaline activation of a Brazilian fly-as
Mat. Res.. Publicado em: 22/08/2019
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3. Maleic Anhydride as a Compatibilizer and Plasticizer in TPS/PLA Blends
In recent decades, starch has been studied as a raw material due to low production costs. The limitations associated with starch being highly permeable to water vapor and its mechanical properties being dependent on the relative humidity have been investigated. The proprieties of thermoplastic starch/poly(lactic acid) (TPS/PLA) blends have been studied by
J. Braz. Chem. Soc.. Publicado em: 2015-08
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4. Corrosion and Wear Resistance of Carbon Films Obtained by Electrodeposition on Ferritic Stainless Steel
In improving the corrosion and hardness proprieties of ferritic stainless steel, the use of protective coatings becomes an interesting alternative. In this study, a carbon layer was deposited on AISI 430 by electrodeposition using N,N-dimethylformamide with the addition of an organic dopant as the electrolyte. The AISI 430 stainless steel was pretreated by a
Mat. Res.. Publicado em: 2015-04
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5. Electrical, mechanical, and thermal analysis of natural rubber/polyaniline-Dbsa composite
A composite of natural rubber (NR) with polyaniline (PANI) was obtained by mixing an aqueous dispersion of dodecylbenzenesulfonic acid (DBSA)-doped PANI with NR latex in different concentrations. Films were obtained by the casting method and characterized by ultraviolet visible near-infrared (UV-Vis-NIR) spectroscopy, thermogravimetry/differential thermograv
Mat. Res.. Publicado em: 20/05/2014
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6. Analysis of creep and shrinkage and its utilization in health monitoring of reinforced concrete column. / Análise da deformabilidade por fluência e retração e sua utilização na monitoração de pilares de concreto.
This thesis presents the study of the time dependent deformation of concrete structures due to creep and shrinkage. Creep, shrinkage, compressive strength, splitting tensile strength and modulus of elasticity tests were performed in mixtures commonly used in construction. Experimental parameters were obtained from these mechanical characterizations and creep
Publicado em: 2010
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7. Influência da temperatura e corrente de trabalho, nas características elétricas e mecânicas do cobre eletrolítico
Fatores críticos no controle de um sistema elétrico, sem dúvida alguma, são os desafios de manter-se toda a sua estrutura física em plenas condições de operação. A infra-estrutura passiva, materiais e acessórios, devem manter suas propriedades elétricas e mecânicas, minimizados aos impactos da descaracterização por excedentes de correntes elét
Publicado em: 2010
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8. 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
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9. Características mecânicas de vergalhões de aço auto-revenido
The rebar steel is one of the most utilized and diffused materials in Brazilian civil construction, as it is in the whole world, but it´s necessary to know more details about the rebar behavior as a material and not only as a structural element. Each day civil engineering searches for new alternatives to maximize the use of materials, from new structural ca
Publicado em: 2009
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10. Modificação do LLDPE através de silanos viabilizando a aplicação em camadas plásticas de linhas flexíveis / Study of silane grafting reactions of low density polyethylene for pipe applications
The flexible lines are flexible structures manufactured through plastic and steel layers that allows its use in order to permit fluid flow in exploration and production of hydrocarbon between offshore oil units and sea bed and/or coast. Nowadays these pipes are one of the main ways to permit the exploration of hydrocarbon in deepwater. The present study aims
Publicado em: 2009
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11. COMPORTAMENTO FÍSICO DE UM LATOSSOLO SOB INTEGRAÇÃO LAVOURA - PECUÁRIA / PHYSICAL BEHAVIOR OF A OXOSOL UNDER CROP-LIVESTOCK INTREGATION
Soil compaction under traffic of animals has become an increasingly significant problem in soils used for crop-livestock integration. The objective of this study was to determine the effect of integration crop-livestock and different soil management systems on their attributes water and mechanical and relate them to the development and productivity of soybea
Publicado em: 2009
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12. Effect of niobium´s content and the cooling rate on the microstructure and corrosion resistance of the Ti-Nb / Efeito do teor de niobio e da taxa de resfriamento sobre a microestrutura e resistencia a corrosão de ligas Ti-Nb
Pure titanium is used commercially as biomaterial in the manufacture of odontologic and orthopedic prosthesis, due to its high biocompatibility and good corrosion resistance. The use of the pure titanium shows deficiency in mechanical proprieties because the mechanics requests are high. When the mechanic s requests are high, like in the hip s total implant,
Publicado em: 2007