Surface Finish
Mostrando 1-12 de 73 artigos, teses e dissertações.
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1. Towards Qualification of Friction Stir Welding to AA5083-O and AA5052-O Aluminum Alloys
Friction Stir Welding (FSW) is an excellent alternative for joining dissimilar and similar materials in comparison to conventional welding processes. In this sense, this work aims at qualifying FSW to similar AA5083-O and AA5052-O aluminum alloys, with 6.35 mm thickness, in a CNC machining center. Therefore, four welding experiments were undertaken. At first
Mat. Res.. Publicado em: 13/01/2020
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2. The Wear Performance of Glazed and Polished Full Contour Zirconia
Resumo Este estudo avaliou a influência dos acabamentos superficiais da zircônia no desgaste de um análogo de esmalte. 40 discos de zircônia foram divididos em quatro grupos: controle (sem acabamento); glazeado; polido; polido e glazeado. Todas as amostras foram submetidas ao desgaste contra antagonistas de esteatita. Os espécimes foram submetidos à an
Braz. Dent. J.. Publicado em: 07/10/2019
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3. Aplicação da técnica de CAMQL na retificação cilíndrica externa do aço AISI 4340 utilizando rebolo de CBN
RESUMO O processo de retificação possui como características o bom acabamento superficial e alta precisão dimensional e geométrica. Assim, peças usinadas por este processo possuem um alto valor agregado por se tratar de um processo de acabamento que é comumente realizado nas últimas etapas da fabricação. Um fator limitador do processo de retificaç
Matéria (Rio J.). Publicado em: 16/09/2019
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4. Análise da rugosidade superficial de barras de aço SAE 1045 após torneamento
RESUMO Neste trabalho foram investigadas as influências de alguns dos principais fatores do torneamento sobre o acabamento da superfície e a rugosidade de uma peça torneada. Foram analisadas barras de aço SAE 1045 torneadas em um torno controle numérico computadorizado (CNC), com auxílio da técnica de Planejamento de experimentos (DOE) para formar tri
Matéria (Rio J.). Publicado em: 20/05/2019
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5. An Investigation on Surface Roughness and Tool Wear in Turning Operation of Inconel 718
ABSTRACT: This paper investigates the influences of three different input parameters, such as feed rate, insert nose radius, and insert coating methods, in the turning operation of Inconel 718. The coating methods were selected as medium temperature chemical vapor deposition (MT-CVD) and physical vapor deposition (PVD) and in addition to coating methods, the
J. Aerosp. Technol. Manag.. Publicado em: 25/02/2019
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6. On the Machinability and Surface Finish of Superalloy GH909 Under Dry Cutting Conditions
GH 909 alloy is a kind of low thermal expansion superalloy with high strength and low expansion coefficient. It is mainly used for manufacturing of aero-engine turbine casings, sealing ring, vanes and other gap control parts, to improve the working efficiency and thrust of the engine as well as to reduce gas loss and fuel consumption. However, the machinabil
Mat. Res.. Publicado em: 21/05/2018
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7. Can low-fusing glass application affect the marginal misfit and bond strength of Y-TZP crowns?
Abstract To evaluate the effect of different surface treatments on the marginal misfit and retentive strength between Y-TZP crowns and an epoxy resin. Forty (40) epoxy resin (G10) abutments (height: 5mm, conicity: 60, finish line: large chamfer) with equal dimensions were milled and included in polyurethane to simulate the periodontal ligament. Next, 40 Y-TZ
Braz. oral res.. Publicado em: 07/05/2018
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8. Electrochemical Behavior of stainless steel AISI 430 exposed to simulated food
ABSTRACT Due to the excellent properties of stainless steel, these materials have a variety of applications among which is the food processing industry. One of the main problems in this industry is the possible releasing of metal ions towards food. For this reason, it is very important to know corrosion behavior of steels that are used in this industry. In t
Matéria (Rio J.). Publicado em: 05/03/2018
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9. TiO2 thin Films for Biofouling Applications
This work presents a study of TiO2 thin films prepared by sputtering, for using as protection for biofouling action on marine structures. Titanium oxide thin films were prepared with different amount of oxygen on the surface of regular 1020 steel, a structural material for marine technology. The cristalline structure analysis evidenced the formation of anata
Mat. Res.. Publicado em: 23/10/2017
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10. 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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11. The Effect of TiO2-SiO2 Nanocomposite on the Performance Characteristics of Leather
In this study the effect of TiO2-SiO2 nanocomposite on various performance characteristics of finished leather was investigated. For this purpose, TiO2-SiO2 nanocomposite was prepared via the sol-gel method from tetraethoxysilane (TEOS) and titanium n-butoxide (TBO) catalyzed with acid at ambient temperature. The prepared composite was applied by spraying on
Mat. Res.. Publicado em: 22/06/2017
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12. Fretting corrosion tests on orthopedic plates and screws made of ASTM F138 stainless steel
Introduction Although there has been significant progress in the design of implants for osteosynthesis, the occurrence of failures in these medical devices are still frequent. These implants are prone to suffer from fretting corrosion due to micromotion that takes place between the screw heads and plate holes. Consequently, fretting corrosion has been the s
Res. Biomed. Eng.. Publicado em: 2015-04