Caracterização estrutural da Liga Al-1% Si

The aim of this study is to characterize the macrostructure and microstructure of Al - 1%Si alloy obtained in sand and metallic molds. Aluminium has good mechanical properties, but adding silicon, even in small quantities, can change the microstructure and improves mechanical behavior. Workpieces were castings in metallic and sand molds and one can see a difference in their cooling curve, macroscopic and microscopic structures. The sand mold casting has lower cooling rate and so its grains are larger. Due to the lower concentration of grain boundary, the hardness is lower compared to that found in metallic molds, which has smaller grains and a higher hardness. Therefore, it can be concluded that the cooling rate and alloying elements affect the final microstructure of the workpiece

Avaliação da tenacidade em um aço microligado, grau API, para aplicação em linhas dutoviárias de petróleo e gás

In order to study the mechanical properties of micro alloyed steel API 5L X70, a material used to manufacture pipes for pipeline transportation lines for use in oil and gas, a study was made of toughness, tensile strength, impact strength, hardness and microstructure steel. To perform these various tests were made where they can acquire the characteristics of the material. Were performed at the Faculty of Engineering in Guaratinguetá in the Department of Materials and Technology and the tensile tests, Charpy impact test, metallography and hardness testing of material API 5L X70, all tests were done with the help of technical laboratories. With these data can be an analysis of the material about his tenacity, his toughness and fragility, its hardness, its yield strength and its maximum voltage. After being asked the analyzes discussed the results showed that the micro alloyed steel API 5L X70 steel is a very tenacious, it absorbs impact energy of 300 Joules though without a break for the full body of evidence showing its tenacity

Propriedades físico-químicas e mecânicas, potencial bioativo e caracterização da interface dentina-cimento de cimentos endodônticos experimentais à base de cimento Portland associados à radiopacificadores micro e nanoparticulados

Pós-graduação em Odontologia - FOAR

Estereótipos linguísticos: questões tradutórias derivadas do tratamento de fraseologismos em dicioinários bilíngues

Reconhecer as unidades fraseológicas de um texto ao traduzi-lo representa para o tradutor uma das grandes dificuldades impostas à sua tarefa de interpretação. Para além do simples reconhecimento, a identificação de um equivalente apropriado na língua de chegada, considerando seu registro de uso e a carga metafórica que encerra, dentre outros aspectos presentes em tais unidades, impõem ao tradutor um árduo trabalho de pesquisa e análise linguística. Analisamos aqui, além da organização da mega, macro e microestrutura, a tradução para o português de unidades fraseológicas em três dicionários bilíngues na direção espanhol/português, a saber: Señas – Diccionario para la enseñanza de la lengua española para brasileños (Universidad Alcalá de Henares), Diccionario Bilíngüe de Uso Español-Portugués/Português-Espanhol e o Gran Diccionario Español/Portugués/ Português/Espanhol. A análise é feita a partir de um levantamento abrangendo as unidades agrupadas pelo campo semântico 'nome de animal', especificamente as organizadas na entrada 'gato'. Embora a expressão de idéias afins seja comum a diferentes línguas e culturas, o maior ou menor grau de idiomatismo de algumas expressões pode ocasionar ao tradutor diferentes níveis de dificuldade ao tentar estabelecer equivalentes para os dois idiomas.

Falsos cognatos francês-português entre termos de estatutos sociais

In this article we address the search for equivalents in the elaboration of a model dictionary for sworn translators of terms used in bylaws, in the Portuguese-French translation direction. We present, specifically, some cases in which the morphological similarity between the two languages can lead to errors, for example false cognates.

Tratamento terminográfico de termos em inglês do comércio Internacional em dicionários franceses

Brazil has a strong trading relationship with several countries, including France, which has intensified these links in recent years and intends to do so yet further. Legal documents regulate this operation, resulting in a set of terms which designate concepts specific to this area. Communication between Brazilian and French buyers and sellers is intense and does not permit the occurrence of errors in understanding orders for merchandise nor in terms of purchase and sale. It is therefore very important that agents of International Trade between Brazil and France should have access to a specialised terminographic tool in the area, containing the relevant terms used in French and Portuguese. This type of work does not currently exist; we therefore decided to make a contribution and draw up a proposal for a bilingual French-Portuguese dictionary in this specialised area. During our research, we registered a significant presence of English terms in International Trade texts originally written in Portuguese and in French, which may be explained by the fact that English currently has the role of global lingua franca. However, it is well known that France operates a policy of linguistic protectionism, making the use of French obligatory in all sectors of activity in France. This generated an area of doubt: how should one deal with English terms in a bilingual French-Portugese dictionary? In order to begin the search for an answer to this question, we decided to see what treatment was given to English terms in the area of International Trade in some French dictionaries. In this paper we shall present the principal results obtained during our research.

Grammaire, Traduction et Dictionnaire: le régime prépositionnel de verbes en français et en brésilien

Cet article concerne quelques réflexions qui étaient à la base de l’élaboration d’un dictionnaire de verbes, en indiquant quelques considérations à l'égard de la traduction pour le français des verbes les plus usuels en portugais qui régissent des compléments habituellement prépositionnels. Nous essayons de contribuer à un nouveau type d'approche, fournissant à l'usager des réponses plus efficaces que celles trouvées dans une grammaire, en vue de la facilité de répérer les prépositions régies par les verbes en portugais, en fonction de leur valeur sémantique, outre l’indication des verbes correspondants en français et leurs transitivités.

Dicionários do GP 'Lexicologia e lexicografia contrastiva'

Conselho Nacional de Desenvolvimento em Pesquisa (CNPq)

Breve análise discursiva em três dicionários de fraseologia

In the current context of Metalexicography several types of studies have been conducted in order to better understand the organization of existing dictionaries and, thus, constitute a knowledge base that would support the development of new works. Regarding specifically the dictionaries of Phraseology, although there are many researchers who engage in this domain, there is still much to study in order to optimize and boost production as much monolingual as bilingual works. The aim of this paper is to present a brief discursive analysis of three phraseological dictionaries considering the pedagogical aspect.

Análise microestrutural e propriedades mecânicas do aço DP 600

Seeking to meet the requirements: relatively low cost of materials and wide applicability in the automotive industry. The best option was the steel Dual Phase (DP), because that is lighter, have high formability, meet the cost requirements and applicability, steel Dual Phase (DP) came to meet these requirements with its two-phase microstructure, ferrite and martensite microstructure who claim to respect and mechanical properties. In this context, the aim of this study was to correlate the microstructure revealed in metallography to the mechanical properties observed in hardness and tensile tests. The microstructure is revealed by etching in 2% nital and then captured images of the sample were processed in ImageJ software to aid in determining the volume fraction of the phases present. Therefore, the mechanical properties were evaluated with respect to volume fraction of the steel layers and analyzed DP 600 together with the mechanical properties obtained by Rockwell hardness test and tensile test. With the values of the mechanical properties calculated and tested, it was possible to describe the method of metallography, as the attack phase and counts, so that it can use this relationship tested/calculated property as a qualitative analytical tool. The method used for the correlation between the microstructure and mechanical properties confirmed the importance of the phases present in the Dual Phase steel to obtain the desired mechanical properties in the application of the steel

Análise microestrutural de tubos API N80 soldados pelo processo HF/ERW para prospecção de petróleo e gás

On the grounds of the great advances achieved over recent years, the process HF/ERW (High-Frequency/Electric Resistance Welding)welded pipe have played an active role in the oil and gas industry for deep water applications, at high and extremely low temperatures, under high pressure and in highly corrosive environments, gradually replacing manufactured pipes by other processes. However, studies have shown that defects in the welded joints are a the leading causes of pipelines failures, which has required the determination of toughness values in this region, in compliance with the strict recommendations of the codes and standards with manufacturers and construction companies, on the oil and gas sector. As part of the validation process required toughness values, this research project focuses on a microstructural analysis in HF / ERW tubes microalloyed, steel grade API 5CT N80, designed to explore oil and gas in deep waters, the subject of strategic relevance to the country because of the recent discoveries in the Santos mega fields: Tupi and Libra (pre-salt). In this scientific work will be presented and discussed the results of mechanical tensile and Charpy, a few CTOD tests curves (showing the trend of toughness values to be obtained), and the microstructures of the base material obtained by optical microscopy, with special emphasis on the formation of non-metallic inclusions in the welded joint

Caracterização de cerâmicas a base de nitreto de silício para aplicações estruturais

The need for development of new materials is a natural process in the companies’ technological point of view, seeking improvements in materials and processes. Specifically, among the materials, ceramic exhibit valuable properties, especially the covalent ceramics which have excellent properties for applications which requires the abrasion resistance, hardness, high temperatures, resistence, etc. being a material that has applications in several areas. Most studies are related to improvement of properties, specially fracture toughness that allows the expansion of its application. Among the most promising ceramic materials are silicon nitride (Si3N4) which has excellent properties. The goal of this work was the development and caracterization of Si3N4-based ceramics, doped with yttrium oxide (Y2O3), rar earth concentrate (CTR2O3) and cerium oxide (CeO2) in the same proportion for the evaluation of properties. The powders' mixtures were homogenized, dried and compressed under pressure uniaxial and isostatic. Sintering was carried out in 1850 ⁰C under pressure of 0,1MPa N2 for 1 h with a heating rate of 25 ⁰C / min and cooling in the furnace inertia. The characterizations were performed using Archimedes principle to relative density, weight loss by measuring before and after sintering, phase analysis by X-ray diffraction, microstructure by scanning electron microscope (SEM), hardness and fracture toughness by the method Vickers indentation. The results obtained showed relative density of 97-98%, Vickers hardness 17 to 19 GPa, fracture toughness 5.6 to 6.8 MPa.m1/2, with phases varying from α-SiAlON and β-Si3N4 depending the types of additives used. The results are promising for tribological applications and can be defined according to the types of additives to be used

Obtenção de rochas sintéticas a partir de resíduos de vidro comercial e pó de granito

Pós-graduação em Engenharia Mecânica - FEG

Caracterização de uma cerâmica 3Y-TZP e avaliação do efeito de tratamentos de superfície na adesão da cerâmica ao glaze ou cimento resinoso

Pós-graduação em Odontologia Restauradora - ICT

Análise da pulsação térmica do processo TIG na soldagem da liga AA6063T6

Pós-graduação em Engenharia Mecânica - FEB