Arc Length
Mostrando 1-12 de 47 artigos, teses e dissertações.
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1. Mechanical behavior of PVD coatings deposited on ADI
ABSTRACT In this work, the mechanical behavior of the coated ADI system is studied. For this purpose, single layer Ti and bilayer Ti/TiN and TiAl/TiAlN coatings, with different thicknesses, were deposited by the PVD technique of cathodic arc deposition on high strength ADI substrates using industrial and experimental devices. The characterization of the coat
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Assessment of digital elevation models to obtain morphometric characteristics in relief transition region
Resumo Objetivou-se com este estudo, avaliar o desempenho de MDEs na caracterização morfométrica de uma bacia hidrográfica situada em região de transição entre os relevos Planalto São Franciscana, Depressão São Franciscana e Serra do Espinhaço. Para o estudo, foram gerados quatro MDEs por interpolação dos dados do SRTM e de cartas topográficas,
Rev. Ambient. Água. Publicado em: 04/02/2019
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3. Predicting intraoperative pain in emergency endodontic patients: clinical study
Abstract This prospective observational study sought to investigate the incidence of intraoperative pain (IOP) among emergency endodontic patients and to construct an IOP prediction model that includes preoperative pain level (PPL). All patients who underwent emergency endodontic treatment at Gazi University, Ankara, Turkey, during the spring term of 2016 we
Braz. oral res.. Publicado em: 06/08/2018
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4. A Contribution to Arc Length Discussion
Abstract An investigation was raising the question: "What does 'arc length' mean?" Actually, it is considered expressing a kind of natural relationship between arc voltage and arc column shape. Statements such as "The higher the voltage the longer the arc" or "The arc voltage proves approximately proportional to the arc length", are frequently noticed in thi
Soldag. insp.. Publicado em: 2015-09
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5. Normalizing effect on fatigue crack propagation at the heat-affected zone of AISI 4140 steel shielded metal arc weldings
The fractography and mechanical behaviour of fatigue crack propagation in the heat-affected zone (HAZ) of AISI 4140 steel welded using the shielded metal arc process was analysed. Different austenitic grain size was obtained by normalizing performed at 1200 °C for 5 and 10 hours after welding. Three point bending fatigue tests on pre-cracked specimens along
Mat. Res.. Publicado em: 02/04/2013
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6. Estudo da influência dos parâmetros no processo de soldagem GMAW - arco pulsado
Pulsed gas metal arc welding describes the metal transfer mode involving oscillation (pulsing) of the welding current from a high pulse current in which level drop growth, necking of wire tip and detachment occur, and a low background current, which is applied to maintain the arc. The advantages of the process are: metal transfer without spatter formation an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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7. Definição de rotas para coleta porta-a-porta de óleo residual de fritura visando o reuso / Definição de rotas para coleta porta-a-porta de óleo residual de fritura visando o reuso
The collection of solid waste generated in urban areas is a growing concern for governments, health professionals and environmentalists. Among these concerns is the disposal of vegetable oil used in homes, which requires a more appropriate final allocation. For this to be attained, it is necessary, in addition to public awareness, the planning for the collec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2010
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8. Modelamento matemático do processo de soldagem GMAW
This thesis describes the development and validation of a mathematical model that describes the electrical and operational behavior of GMA welding. Initially it was developed a static model that was able to simulate welding conditions characterized by small current and tension variation usually found with free-flight metal transfer. Afterwards, a dynamic mod
Publicado em: 2010
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9. Levantamento de mapas operacionais de transferência metálica para soldagem MIG/MAG de aço ao carbono na posição plana / Operational Mapping of Metal Transfers for Carbon Steel Gas Metal Arc Welding in Flat Position
The MIG/MAG process is nowadays the most important welding process. This is due to its high production capacity, characteristic searched by industries to improve their manufacturing processes. Thus, due to this process relevance, development of tools that helps to understanding how it works comes out as necessary, especially in relation to proper welding set
Publicado em: 2010
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10. Structural model with contact between pulmonary alveolus walls. / Modelo estrutural com contato entre paredes de alvéolo pulmonar.
This work is an important step on the development of a computational model of lung parenchyma capable to simulate mechanical ventilation maneuveres. The lung has a complex and hierarchized structure. Therefore a multidisciplinary literature review was held. The review presents the mechanical properties of the parenchyma, its morphology and the effects of sur
Publicado em: 2010
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11. Description of Neblinichthys brevibracchium and N. echinasus from the upper Mazaruni River, Guyana (Siluriformes: Loricariidae), and recognition of N. roraima and N. yaravi as distinct species
Neblinichthys brevibracchium and N. echinasus are new sympatric species from upland tributaries of the Mazaruni River (Essequibo River basin) of Guyana. These two new species are the first Neblinichthys reported from Guyana. Adult males of both new species have short pectoral-fin spines and several series of hypertrophied odontodes covering the entire dorsal
Neotropical Ichthyology. Publicado em: 2010
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12. Estudo exploratÃrio de parÃmetros de soldagem de revestimentos com ligas de NÃquel empregando o processo TIG com alimentaÃÃo de arame frio / Exploratory study of coating welding parameters with nickel alloys using GTAW with cold wire feeding
The aim of this work was to carry out a systematic study of GTAW welding parameters with feeding of cold wire for covering application of nickel alloys (UNS N06625, UNS N06686 and UNS N10276) in substract of steel C-Mn considering the analysis of geometric, economic and operational characteristics of layers, form to adjust these coverings for the industries
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/01/2009