Superalloys
Mostrando 1-12 de 15 artigos, teses e dissertações.
-
1. Estudo do envelhecimento e do tratamento térmico de rejuvenescimento da superliga GTD111
RESUMO A superliga de níquel GTD111 é comumente utilizada na fabricação de pás de turbinas a gás, destinadas a geração de energia e aplicações aeronáuticas. O presente estudo investiga o comportamento desta superliga “como fornecida” pelo fabricante e previamente tratada termicamente à fim de diminuir o tamanho de γ’ e transformá-lo de mo
Matéria (Rio J.). Publicado em: 16/09/2019
-
2. 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
-
3. Electrochemical corrosion characterization of nickel aluminides in acid rain
ABSTRACT Nickel aluminides have been extensively studied in recent decades to replace superalloys, in some components of aircraft turbines, because they have excellent corrosion resistance. Many industrial cities have the problem of air pollution, which has forced the study of the degradation of these alloys in the presence of acid rain. The aim of this work
Matéria (Rio J.). Publicado em: 19/07/2018
-
4. The Evolution of the Niobium Production in Brazil
Niobium (Nb) was initially applied in the industry in 1933 to stabilize stainless steels against intergranular corrosion. Around 1970, niobium started to be used in many technological applications, especially in heat treatments at high temperatures, in the form of superalloys and, over the past four decades, Nb has been employed on an industrial scale. Durin
Mat. Res.. Publicado em: 2015-02
-
5. Evaluation of fatigue strength at high temperature superalloy MAR-M247 (Nb) / Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb)
Este projeto faz parte de uma Rede Interdisciplinar de Pesquisa em Superligas no Brasil (Projeto Pró-Engenharias - CAPES), que tem como objetivo o desenvolvimento técnico e científico do Brasil nesta classe de materiais. A rede é composta por especialistas de estabelecida competência em assuntos fundamentais para o desenvolvimento de materiais estrutura
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2012
-
6. Estudo experimental do sistema Ta-Ge e da região rica em Ta do ternário Ta-Ge-B / Experimental Investigation of the Ta-Ge System and of the Ta Rich Region of Ta-Ge-B Ternary System.
Jet engines are important and complex engineering devices, whose efficiency and performance are directly related to the operating temperature of the combustion chamber, the higher the gas temperature in this region, the greater the overall efficiency of the process, resulting in economy of fuel and more efficiency. Ni-based superalloys are currently used in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/05/2011
-
7. Si3N4 ceramic cutting tool sintered with CeO2 and Al2O3 additives with AlCrN coating
Ceramic cutting tools are showing a growing market perspective in terms of application on machining operations due to their high hardness, wear resistance, and machining without a cutting fluid, therefore are good candidates for cast iron and Nickel superalloys machining. The objective of the present paper was the development of Si3N4 based ceramic cutting i
Materials Research. Publicado em: 01/11/2011
-
8. A comparative study of the corrosion resistance of incoloy MA 956 and PM 2000 superalloys
Austenitic stainless steels, titanium and cobalt alloys are widely used as biomaterials. However, new medical devices require innovative materials with specific properties, depending on their application. The magnetic properties are among the properties of interest for some biomedical applications. However, due to the interaction of magnetic materials with M
Materials Research. Publicado em: 2010-12
-
9. Processamento e caracterização de rotores automotivos da superliga MAR-M247 / Processing and characterization of nickel based superalloy MARM247 turbine wheels
A superliga policristalina à base de níquel MAR-M247 foi desenvolvida na década de 70. Sua ótima composição, estabilidade microestrutural, excelente resistência à fluência e à oxidação e boa resistência à corrosão a quente faz dessa superliga uma das mais utilizadas em rotores durante os últimos 20 anos. Os objetivos do presente trabalho são
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2009
-
10. Crecimiento de particulas γ' en una superaleación CMSX-2
Nickel based-superalloys are used in applications requiring strength at high temperatures. Most of these alloys are precipitation hardened by a γ'[(Al,Ti)] phase coherently precipitated in a fcc matrix. The properties and resistance to microestructural changes at high temperatures depend on factors such as particle size, coarsening rate, distribution and vo
Matéria (Rio J.). Publicado em: 2006
-
11. DEVELOPMENT OF A METHODOLOGY FOR THE SEPARATION OF EUROPIUM AND SAMARIUM FROM A MIXTURE OF RARE EARTH OXIDES BY ELECTROREDUCTION/PRECIPITATION / "Desenvolvimento de uma metodologia para a separação de Samário e Európio a partir de mistura de óxidos de Terras Raras por redução eletroquímica/ precipitação"
The rare earths (RE) were first used in 1903, when Welsbach developed a lighter that is still used today. Nowadays, the RE are employed in many different fields, as in the production of super-alloys , as catalysts for petroleum industry, in the manufacture of non-ferrous alloys, color television tubes, x-ray screens, special glasses, ceramics, computer indus
Publicado em: 2006
-
12. Oxygen-induced intergranular fracture of the nickel-base alloy IN718 during mechanical loading at high temperatures
There is a transition in the mechanical-failure behavior of nickel-base superalloys from ductile transgranular crack propagation to time-dependent intergranular fracture when the temperature exceeds about 600 °C. This transition is due to oxygen diffusion into the stress field ahead of the crack tip sufficient to cause brittle decohesion of the grain bounda
Materials Research. Publicado em: 2004-03