Lead Alloy
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. Effect of Squeeze Casting on Microhardness and Microstructure of Al-3Cu-xSi Alloy
Aluminum alloys of the ANSI series 319 present Si and Cu as the main alloying elements and the mechanical strength of these alloys can be improved by the precipitation of the metastable Al2Cu phase. Squeeze Casting is a casting process in which the cast metal is deposited in a metal mold and solidified under certain pressure exerted by a punch. This process
Mat. Res.. Publicado em: 30/09/2019
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2. Influência da adição de Sn na resistência à corrosão e na capacidade de recarga da liga Pb-1,5%Sn para grade positiva de baterias chumbo-ácido
RESUMO O presente trabalho teve como objetivo avaliar o processo de corrosão do Pb e da liga Pb-1,5%Sn quando submetidos à condição de ciclagem em meio de ácido sulfúrico, visando compreender a influência da adição de Sn na resistência à corrosão e na capacidade de recarga para grades positivas de baterias do Pb-ácido. As amostras de estudo fora
Matéria (Rio J.). Publicado em: 20/05/2019
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3. 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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4. Movimiento de las interfases durante la solidificación horizontal de aleaciones estaño-zinc
ABSTRACT Solidification processing is one of the important routes to produce materials, especially metals and alloys. The parameters for the transformation from liquid to solid, such as the temperature gradient, the growth rate, the cooling rate, the interphase velocity, vary from process to process and in one process also as a function of time and space. Th
Matéria (Rio J.). Publicado em: 19/07/2018
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5. Effect of Scroll Pin Profile and Tool Rotational Speed on Mechanical Properties of Submerged Friction Stir Processed AZ31B Magnesium Alloy
In this study, an effort has been made to choose an appropriate tool pin profile and rotational speed for a tool using a submerged friction stir processed hot rolled AZ31B magnesium alloy. A defect free process region was obtained using a novel tool shoulder, which consisted of a scroll. Three tool pin profiles, namely, simple cylindrical, stepped cylindrica
Mat. Res.. Publicado em: 19/04/2018
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6. Ultrafine-Grained Ti-13Nb-13Zr Alloy Produced by Severe Plastic Deformation
Biomedical devices currently in use (prostheses, implants) have satisfactory performance in many cases. However, sometimes the body reacts to the device insertion and may lead to its rapid replacement. Some of these disadvantages can be solved by the use of titanium and its alloys, due to their excellent combination of corrosion resistance, wear resistance a
Mat. Res.. Publicado em: 09/10/2017
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7. Surface Modification of Ti6Al4V Alloy by Pulsed Lasers: Microstructure and Hydrophobic Behavior
In many aerospace applications, it is important to produce hydro-repellent surfaces because water and ice accumulation could lead to malfunctioning of the part or component with a potential critical failure. In this study, it was investigated the texturing of a titanium alloy (Ti6Al4V) by applying a pulsed Nd:YAG laser, aimed at the surface characterization
Mat. Res.. Publicado em: 21/09/2017
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8. Synthesis, Characterization and Electromagnetic Properties of SnO-coated FeNi Alloy Nanocapsules
SnO-coated FeNi alloy nanocapsules have been synthesized by an arc-discharge method. High-resolution transmission electron microscopy and x-ray photoelectron spectroscopy analysis show that the nanocapsules have a shell/core structure with FeNi alloy nanoparticles as the core and amorphous SnO as the shell. Dielectric relaxation of SnO shell and the interfac
Mat. Res.. Publicado em: 10/10/2016
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9. Graphite and Nickel Containing Tin Bronze-Steel Bimetals as Lead Free Bearing Materials
Ni was added into graphite-lead free tin bronze composite layers on surface of steel sheets by primary sintering mixed powders of graphite and CuSn10 with addition of a nickel nitrate and poly(vinyl alcohol) (PVA) solution in an ammonia decomposition atmosphere. The reduced Ni particles attached on the surface of graphite and CuSn10 particles help to link th
Mat. Res.. Publicado em: 20/05/2016
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10. Ti-based BCC Alloy: Dehydrogenation Characterization Using Synchrotron and Neutron Diffraction
Dehydrogenation of a BCC alloy of composition 52Ti-12V-36Cr doped with 4 wt.% Zr7Ni10 was studied by diffraction using synchrotron and neutron radiations. In the case of synchrotron radiation dehydrogenation was imposed by raising the temperature while keeping the sample under vacuum. We found that prior to final dehydrogenation the FCC dihydride phase is be
Mat. Res.. Publicado em: 17/05/2016
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11. An investigation into the dissolution characteristics of γ precipitates in Mg-3Al-Zn alloy
In non-equilibrium conditions, the coring phenomena may occur in the α-Mg solid solution and γ-Mg17Al12 phase forms in the microstructure of AZ magnesium alloy series. This eutectic phase may introduce detrimental effect on workability of wrought alloys. In the present work, the dissolution characteristics of γ phase have been investigated in AZ31 wrought
Mat. Res.. Publicado em: 01/08/2014
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12. Velocidad de corrosión de una aleación base plomo en una solución de ácido sulfúrico a diferentes temperaturas
Car batteries are not only affected by their use and wear but also by other factors such as electrolyte concentration, water loss and temperature that can be exposed, the latter being the most influential factor causing an increase in the corrosion rate of lead alloys (battery components), and affecting their service time. Therefore, for the industry of auto
Matéria (Rio J.). Publicado em: 2014-06