Laves Phase
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Effect of Dilution on the Microstructure and Properties of CoCrMoSi alloy Coatings Processed on High-Carbon Substrate
The Laves phase reinforced CoCrMoSi alloy system has emerged as a candidate material to protect the surface of components to withstand harsh environments under wear and/or corrosion. However, previous reports have raised some concerns and restricted a wider selection of iron-based substrates to be coated, especially limiting the carbon content. This work aim
Mat. Res.. Publicado em: 14/11/2018
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2. Effect of Track Overlap on the Microstructure and Properties of the CoCrMoSi PTA Coatings
Broadly speaking, the research and design of coatings are generally studied by way of single-track deposits; otherwise, the development of a coated part entails the understanding of how multi-track welding influences the microstructure and properties of the surface. This study evaluated the effect of track overlap on the microstructure and properties of the
Mat. Res.. Publicado em: 2015-06
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3. Effect of niobium in the phase transformation and corrosion resistance of one austenitic-ferritic stainless steel
Austenitic-ferritic stainless steels containing 0.2% and 0.5% niobium were evaluated with respect to the microstructures, microhardness, pitting potential resistance, electrochemical impedance and wearing tests. Niobium is an alphagenic element and has a great influence on phase transformation of duplex stainless steels. In the present investigation, the sam
Mat. Res.. Publicado em: 01/08/2014
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4. Effect of processing on microstructure and properties of CoCrMoSi alloy
CoCrMoSi alloys microstructure is affected by processing and their properties have been associated with the high volume fraction of Laves phase. However, not much has been reported on the effect of structure refinement and morphology on the properties of these alloys. This paper evaluates a CoCrMoSi alloy processed by centrifugal casting and Plasma Transferr
Mat. Res.. Publicado em: 29/07/2013
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5. Hydrogen absorption/desorption properties in the TiCrV based alloys
Three different Ti-based alloys with bcc structure and Laves phase were studied. The TiCr1.1V0.9, TiCr1.1V0.45Nb0.45 and TiCr1.1V0.9 + 4%Zr7Ni10 alloys were melted in arc furnace under argon atmosphere. The hydrogen absorption capacity was measured by using aparatus type Sievert's. Crystal structures, and the lattice parameters were determined by using X-ray
Mat. Res.. Publicado em: 09/08/2012
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6. âRevestimento por soldagem MIG/MAG empregando ligas de nÃquel para apliacaÃÃes em componentes do setor de petrÃleo e gÃs naturalâ / Gmaw Welding Overlay Of Nickel-Based Alloys For Applications In Oil And Natural Gas Components
The weld overlay of nickel-based alloys is an alternative often used in oil and gas industry to prevent corrosion in pipes and equipments operating under severe conditions. In many situations the requirements of weld overlays are based in a maximum of 5% iron content in the weld metal to ensure corrosion resistance. The aim of this study was to determine the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/12/2010
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7. Revestimentos de liga de nÃquel depositados pelo processo TIG com alimentaÃÃo de arame frio: aspectos operacionais e metalÃrgicos / Nickel based alloys weld overlay deposited by gtaw cold wire feed: operational and metallurgical aspects
The weld overlay with nickel-based alloys is an interesting alternative for the construction and repair of equipments for applications in severe corrosive medium, allowing reach the desirable characteristics (corrosion resistance) with a significant reduction of cost. In this context, the GTAW cold wire feed process can be a good option for overlay depositio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/04/2010
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8. Precipitação de fase de laves no aço inoxidável superferrítico 28%Cr-4%Ni-2%Mo-Nb. / Laves phase precipitation in a 28%Cr-4%Ni-2%Mo-Nb superferritic stainless steel.
Estudos anteriores de precipitação, em outros aços superferríticos, constataram a ocorrência de precipitação das fases sigma, qui, de Laves e até de austenita, que no posterior resfriamento pode se transformar em martensita. O objetivo principal do presente trabalho foi estudar a precipitação de fases de Laves no aço inoxidável superferrítico X
Publicado em: 2006
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9. Diagramas de fases Al-Cr, Cr-Nb e secçãoAl-Cr-Nb a 1000 C
t: The AI-Cr-Nb system appears as an interesting system in the field of superalloys. The purpose of his work is to revise the isothermal section AI-Cr-Nb at 1000°C as well as to verify the binaries AI-Cr and Cr-Nb. The AI-Cr phase diagram consists af a peritectic reaction at 1315° C, , between the liquid and (Cr) phases, which on cooling results in the Al8
Publicado em: 1991
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10. Ressonancia paramagnetica eletronica do ion Gd3+, em hidretos metalicos do tipo fase de laves AB2Hx
The ternary intermetallic hydrides LaRu2Hx, CeRu2Hx, YRh2Hx and YNi2Hx, doped with Gd3+ ions, were investigated in function of both the hydrogen concentration, x, and temperature. A single EPR line was observed for Gd in the uncharged LaRu2 compound (x = O) in the normal state. The EPR parameters were found in good agreement with the previously published dat
Publicado em: 1988