Microstructural Modifications
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Development of the urinary system in guinea pig females (Cavia porcellus)
RESUMO: Os porquinhos-da-índia são modelos animais amplamente utilizados em pesquisas relacionadas a biologia do desenvolvimento. O objetivo deste trabalho foi demonstrar o processo de formação e diferenciação dos órgãos urinários em fêmeas da espécie no período pré-natal. Foram utilizadas quatro fêmeas aos 25, 30, 45 e >65 DG (dias de gestaç�
Pesq. Vet. Bras.. Publicado em: 30/09/2019
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2. Mejora de la resistencia al desgaste abrasivo de un revestimiento Fe-Cr-Mn-C mediante la adición de V
ABSTRACT The aim of this work is to increase the abrasive wear resistance of a coating, applied on plates of AISI 1020 carbon steel, using tubular coated electrodes with the Fe-Cr-Mn-C alloy system. In order to achieve this increase, V was added to the alloy system. The resulting coating were studied using optical microscopy (MO), X-ray diffraction and micro
Matéria (Rio J.). Publicado em: 20/05/2019
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3. Efeito da simplificação sintática sobre a compreensão de leitura de crianças do ensino fundamental
RESUMO Objetivo Investigar o efeito da estratégia de simplificação sintática de textos sobre o desempenho em compreensão leitora de escolares de 20 a 40 ano do ensino fundamental. Métodos Estudo transversal, analítico, caso controle. Participaram 112 escolares do ensino público, do 20 ao 40 ano escolar. Os participantes foram distribuídos em Gru
Audiol., Commun. Res.. Publicado em: 31/01/2019
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4. Designing a Microstructural Array Associated with Hardness of Dual-phase Cu-Zn Alloy Using Investment Casting
A comparative investigation on the microstructural morphologies and hardness values of Cu-35 wt.% Zn and Cu-30 wt.% Zn with 1.5 wt.% Al content is provided. Distinctive specimens by using traditional investment casting were produced. Specimens withdrawn from distinct locations along the castings were thermally and microstructural analyzed. Thermally and chem
Mat. Res.. Publicado em: 21/05/2018
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5. Evaluation of Microstructure and Mechanical Properties of Seamless Steel Pipes API 5L Type Obtained by Different Processes of Heat Treatments
This research presents the influence of manufacturing processes and heat treatments on the resulting microstructures and mechanical properties of an API 5L PSL2 seamless steel pipe. Three different conditions are considered - as rolled, normalized and quenched and tempered - to obtain the grades X42R, X42N and X70Q, respectively. Scanning electron microscopy
Mat. Res.. Publicado em: 06/03/2017
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6. Influence of Heat Input and Filler Metal on Mechanical Properties and Microstructure of Microalloyed High Strength Steel Welded by FCAW
AbstractCurrently, microalloyed high strength steels are being widely used to replace C and C-Mn steels for their advantages in terms of mechanical properties, corrosion resistance and weldability, allowing weight reduction of vehicles and structures without impairing their strength. When these steels are welded, the welding heat cycle causes microstructural
Soldag. insp.. Publicado em: 2015-06
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7. Modificação e caracterização da superfície do aço inoxidável Martensítico AISI 410 / Surface modification and characterization of the AISI 410 Martensitic stainless steel
This work deals about the surface modification of the AISI 410 martensitic stainless steel. The modification of steel surfaces is important for the improvement of its mechanical and tribological properties. Among the modification processes, there are coating, deposition of thin films, and ion implantation. The AISI 410 stainless steel is widely applied by ma
Publicado em: 2010
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8. Análise de falha e de proposta para procedimento de fabricação e reparo de defletor de vaso de pressão confeccionado em aço inoxidável duplex / Failure analysis and proposal for fabrication and repair procedure for a pressure vessel deflector made of duplex stainless steel
Este trabalho trata sobre a análise de falha realizada em conjunto defletor de um vaso de pressão de indústria petroquímica, fabricado em aço inoxidável duplex UNS S31803, e de proposta de procedimento de fabricação e reparo sugerido pelo fabricante do material. Utilizou-se de métodos de metalografia e espectrometria de fluorescência de raios-x par
Publicado em: 2010
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9. Caracterização microestrutural e eletroquímica de revestimentos ambientalmente amigáveis aplicados sobre a liga de Al 2024-T3. / Microestructural and electrochemical characterization of environmentally friendly coatings applied on Al alloy 2024-T3.
The increasing concern with sustainable development, allied with a stronger awareness with environmental preservation, has stimulated researches in order to find environmentally friendly substitutes to replace the efficient hexavalent chromium-based pre-treatment systems (Cr6+) used to protect high-strength aluminium alloys employed in the aircraft industry.
Publicado em: 2007
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10. Efeitos da substituição do Cu por Mn no composto YBA2Cu3O7-G
Samples of the compounds YBa2(Cu1-xMnx)3O7-d , x = 0,0, 0,01, 0,025, 0,05, 0,075, 0,10, 0,15 e 0,20, were sintered at. 950º, 970º e 1020º C. These samples were characterized by X ? ray diffraction, optical metallography, electrical resistivity and magnetic susceptibility. Superconductivity around 92 K for all samples. The YBa2Cu3O7-d solubility limit for
Publicado em: 1990