Cladding
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. Using digital image processing and Unmanned Aerial Vehicle (UAV) for identifying ceramic cladding detachment in building facades
Resumo As ações que compõe o processo de manutenção em fachadas são orientadas pelos resultados obtidos na fase de inspeção. Algumas propostas metodológicas que visam a otimização do processo de inspeção têm sido discutidas, entre essas destacam-se as técnicas de Processamento Digital de Imagens (PDI) capturadas por Veículo Aéreo Não Tripul
Ambiente Construído. Publicado em: 2022
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2. Optical Fiber Coupler Analysis Using Daubechies Wavelets
Abstract This article presents the theoretical analysis of a signal coupling between a proposed Photonic Crystal Fiber (PCF) and a Conventional Fiber with Step Index (CFSI) system. In this analysis, the Finite Element Method (FEM) and Beam Propagation Method (BPM) are applied together with Daubechies wavelets as basis function and described in the mathematic
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-09
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3. Performance of the INCONEL 625 alloy weld overlay obtained by FCAW process
ABSTRACT Nickel-based weld overlays (cladding) are commonly used in oil & gas industry to extend the life of equipment under corrosive environment, as it improves the corrosion resistance without a significant increase in the manufacturing cost, when compared to a full nickel-based alloy equipment. Although there are extensive literature involving overlays a
Matéria (Rio J.). Publicado em: 20/05/2019
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4. Microstructure and Wear Resistance of ZrC-ZrB2 /Ni Composite Coatings Prepared by Plasma Transferred Arc Cladding
The ZrC-ZrB2/Ni metal matrix composite coatings were in-situ synthesized from a mixture of Ni, Zr and B4C by plasma transferred arc (PTA) cladding process. Microstructures and phase constituents of the coatings were characterized by electron probe micro-analyzer (EPMA) and X-ray diffraction (XRD). Microhardness and wear resistance of the coatings were system
Mat. Res.. Publicado em: 06/05/2019
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5. Characterization of Phase Transformations and Microstructural Changes in an API 5CT L80 Steel Grade During Ni Alloy Laser Cladding
The superficial coatings in micro-alloyed steel pipes has been a pointed way to decrease the corrosion problems in oil and gas industry. However, little emphasis has been given to the substrate. The effects of the deposition method on the steel microstructure and properties are still not well described. In this context, this work studied the effect of Ni sup
Mat. Res.. Publicado em: 26/07/2018
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6. Caracterización del comportamiento frente a la corrosión en soldaduras de recargue de aceros inoxidables superdúplex
ABSTRACT Superduplex stainless steels have a dual structure constituted approximately by 50% of ferrite and 50 % of austenite. This fact produces a good combination of mechanical properties and corrosion resistance. Thanks to these features their use is growing, mainly in the industries of paper, chemical, gas and oil. Surfacing welding is used for the manuf
Matéria (Rio J.). Publicado em: 19/07/2018
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7. Effect of blisters and rims on radial hydride precipitation in fuel elements under dry storage conditions
ABSTRACT Hydrogen enters in Zry clads during fuel element life in service; when hydrogen exceeds the terminal solid solubility, circumferential hydrides are precipitated. In the presence of thermal gradients, produced for instance by oxide spallation, localized concentration of hydrides - known as blisters - can be formed. Due to the fact that zirconium hydr
Matéria (Rio J.). Publicado em: 19/07/2018
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8. Laser Cladding of Fe-based Metallic Glass/MoS2 Self-lubricating Composites: Effect of Power and Scanning Speed
MoS2 powder has been used to form "self-lubricating" composite coatings, which are very useful to increase the lifetime of machines where liquid lubricants cannot be used. In this work, amorphous overspray powder of Fe60Cr8Nb8B24 (at%) alloy was mixed with 5wt.% MoS2 powder and it was used to produce single tracks on AISI 1020 steel substrates by laser cladd
Mat. Res.. Publicado em: 01/02/2018
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9. Microstructural Evolution and Phase Transformation in Laser Cladding of Cr and Mo Powder on Grey Cast Iron: Mixture Design of Experiment (DOE)
Laser cladding on grey cast iron at high power processing was investigated for microstructural evolution and phase transformation to enhance surface properties. Cladding was designed using a mixture of DOE with peak power (Pp) and pulse repetition frequency (PRF), and a mixture component of Cr and Mo ratio as factors. Microstructural findings indicated absol
Mat. Res.. Publicado em: 21/11/2017
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10. Metallic Glass Formation Upon Rapid Solidification of Fe60Cr8Nb8B24 (at%) Alloy through LASER Cladding and Remelting
Fe60Cr8Nb8B24 (at%) amorphous powder and ingot were submitted to LASER cladding and remelting process, respectively. Fe-based coatings were produced using different LASER processing parameters and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Vickers microhardness. All coatings obtained by LASER cladding (LC) and layers obt
Mat. Res.. Publicado em: 17/11/2017
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11. Effect of solvents on the morphology of PMMA films fabricated by spin-coating
Abstract A method to produce thin layer of PMMA (poly (methyl methacrylate) films by spin coating is reported. PMMA is dissolved in xylene, a mixture of MIBK-xylene and chloroform. Varying the PMMA concentration and spin-coating speeds controls the thickness of the PMMA films. Using chloroform as solvent evidenced thickness around 10 μm. This thickness is s
Polímeros. Publicado em: 21/09/2017
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12. Synthesis of Vanadium Interface for HFCVD Diamond Deposition on Steel Surface
Laser cladding of vanadium carbide powder developed an interlayer on AISI D6 steel as a diffusional barrier and to relief thermal residual stress. Laser cladding experiments varied resolution (DPI) and scanning speed (mm/s). CVD diamond deposition on this interface went on by HFCVD technique. The coatings were characterized by X-ray diffraction analysis (XRD
Mat. Res.. Publicado em: 06/07/2017