A5053967138- Aluminum Alloys Composites Properties
- Advanced Welding Techniques Analysis
- Aluminum Alloy Microstructure Properties
- Microstructure and Mechanical Properties of Steels
- Metal Forming Simulation Techniques
- Microstructure and mechanical properties
- Metallurgy and Material Forming
- Metal Alloys Wear and Properties
- Metal and Thin Film Mechanics
- Metallurgical Processes and Thermodynamics
- Agricultural and Food Sciences
- Advanced Machining and Optimization Techniques
- Mechanical stress and fatigue analysis
- Recycling and Waste Management Techniques
- Metallurgical and Alloy Processes
- Welding Techniques and Residual Stresses
- Laser Material Processing Techniques
- Advanced materials and composites
- Electrical Fault Detection and Protection
- Concrete Corrosion and Durability
- biodegradable polymer synthesis and properties
- Ocular and Laser Science Research
- Hydrogen embrittlement and corrosion behaviors in metals
- Metallurgy and Material Science
- Electrodeposition and Electroless Coatings
Federal Center for Technological Education Celso Suckow da Fonseca
2016-2024
National Council for Scientific and Technological Development
2023
Military Institute of Engineering
2014-2019
Dislocations are responsible for most aspects of plastic deformation in metals. In this work, the dislocation density, ρ, brass was estimated after different processes via line broadening X-ray diffractograms using Convolutional Multiple Whole Profile Program (CMWP) and by Transmission Electron Microscopy (TEM). addition, we attempted to evaluate, on a global basis, influence crystallographic texture ρ analysis, making sure that results obtained XRD could be trusted even samples with...
RESUMO No setor automotivo as ligas de alumínio têm se destacado por sua atraente combinação entre resistência/peso, outras características. As da série 5XXX tem seu ganho resistência mecânica através processos deformação a frio, e propriedades mecânicas das estão diretamente relacionadas à composição ao processo fabricação utilizado em manufatura. Um dos requisitos para otimizar operações conformação é o controle microestrutura textura. Neste trabalho, AA 5052 5050C, produzidas Fundição...
This work studies the microstructural characteristics and mechanical properties for different aluminium alloys (1100, 3104 8011) hot rolled sheets that were subjected to a solution heat treatment with distinct soaking times, in order promote changes on these solute fractions slightly above maximum solubility limit.Scanning Electronic Microscopy (SEM) / Energy Dispersive Spectroscopy X-Ray (EDS), Diffraction (XRD) Hardness Tests employed observe compositional evaluation.For 1100 8011 more...
The API 5L X70 steel is used in high-pressure gas transmission pipelines. Because of this, knowledge presence residual stress and their magnitude important to assess the material integrity service. For pipeline manufacturing, tubes need be curved which often made using hot induction bending process. This process can introduce different depending tube position. this research, order evaluate stress, was an that previously by Samples were taken from extrados, intrados, neutral line straight...
This study evaluates the influence of structural changes promoted by a solution heat treatment (ST) on recrystallization and grain growth during annealing 3105 Al alloy subject to asymmetric rolling. Optical Microscopy, Scanning Electron Microscopy (SEM)/X-Ray Energy Dispersive Spectroscopy (EDS), X-Ray Diffraction (XRD), dilatometric analysis Vickers hardness tests were used evaluate microstructural mechanical properties. The kinetics could not be evaluated because incomplete due chosen parameters.
Samples of the Al 7075 naturally and artificially aged were processed by conventional asymmetrical rolling with 5% thickness reduction. The processes evaluated under room temperature warm condition (130°C). Mechanical properties uniaxial tensile Vickers microhardness tests. Microstructure evolutions followed optical microscopy analysis. Naturally samples showed better yield strengthening processing. Greater ultimate stress ductility processing was also noticed in specimens. Artificially...
The effects of asymmetric and conventional deformations annealing on the microstructure non-grain-oriented (NGO) 3 wt% silicon steel were analyzed by x-ray diffraction, optical microscopy magnetometry. results suggest that pure rolling tends to lessen magnetic losses. However, intermediate resulted in lower planar anisotropy, which could be estimated from anisotropy theory. In this work, it was shown theory is able predict J50 polarization values using crystallographic texture.
During production and heat treatments of aluminum alloys, numerous second phase particles form, which maximizes their mechanical properties. This work aimed to perform a correlation between Vickers hardness X-ray diffraction results, when 7475-T7351 alloy processed by the cross rolling is subjected annealing (AHT) at 500 °C for different soaking times (15, 30 60 minutes) time 15 minutes temperatures (200, 300 400 °C). The influence AHT (500 / on microstructure, via scanning transmission...
Ligas de alumÃnio são amplamente empregadas no setor aeronáutico devido suas boas propriedades fÃsico-quÃmicas, onde estudos contÃnuos desenvolvidos a fim otimizar adequadas para processos conformação diferenciados, citar superplástica que o objetiva materiais grão ultrafinos. Este trabalho teve por objetivo avaliar potencial promover assimetria microestrutural e mecânica em uma liga 7475-T7351 laminada quente quando do processamento via laminação assimétrica com razão entre...
The crystallographic texture developed during cold rolling and subsequent annealing of interstitial free sheet steels aims to increase conformability. For this, it is necessary obtain partial α-fiber continuous homogeneous γ-fiber components. In this work, the influence symmetric (SR) asymmetric (AR) on mechanical properties an steel (IF) was investigated. Symmetric yields α- γ-fibers, which are enhanced as deformation increases. Moreover, weakening occurs due recrystallizations, improving...
The mechanical strength of the 7XXX series aluminum alloys can be improved through cold rolling due to hardening, however, there is a reduction on ductility, thus requiring later stage annealing heat treatment. present work aimed evaluation effects an treatment at 500 °C for 15 minutes, microstructure and properties rolled 7475-T7351 alloy with 3 mm thickness. For this purpose, it was used microstructural characterization by scanning electron microscopy / X-ray Dispersive Energy...
O objetivo deste trabalho foi a obtenção de microestruturas diferenciadas, em um aço baixo carbono com microadição Molibdênio e Nióbio laminado quente, após submetê-lo diferentes meios resfriamento antes temperatura interrupção 600°C (que simulava bobinamento).A evolução microestrutural mecânica avaliada o auxílio técnicas microscopia óptica eletrônica varredura, testes dureza Vickers tração uniaxial, somado determinação das temperaturas transformação fase analisador termomecânico (TMA).De...
O presente trabalho faz a caracterização microestrutural e mecânica da liga de alumínio 3105 submetida duas técnicas Deformação Plástica Severa (NECAE -Extrusão em Canais Não-Equiangulares, Laminação Assimétrica), fim se eleger entre as melhor para obter uma microestrutura mais encruada refinada.As avaliações foram feitas por Difração Raios-X (DRX), análise dilatométrica ensaio dureza Vickers, quais permitiram avaliar forma indireta o grau encruamento / refinamento estrutura resultante cada...
Resumo: O Friction Stir Processing (FSP) vem sendo largamente utilizado para o refinamento e homogeneização microestrutural de metais e, com isso, tem-se uma melhora da resistência mecânica