Alloy Fe Cr
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Influencia del Aporte Térmico Sobre la Microestructura en Recargues Duros Multicomponentes (Cr, Mo, W, Nb, C, B) Nanoestructurados Base Hierro
Abstract: Surfacing welding is an issue that was increasing in relevance in last years, related with a raising number of applications in several industries. Hardfacings of nanostructured multicomponent steel of recent creation, have a set of outstanding properties. Nevertheless, the information available related with its processing is still scarce. The aim o
Soldag. insp.. Publicado em: 09/10/2017
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14. Kinetics Oxidation and Characterization of Cyclically Oxidized Layers at High Temperatures for FeMnSiCrNiCe and FeSiCrNi Alloys
Conventional stainless steels are used in cyclic oxidation, but the high amount of Cr and mainly Ni increase the price of these alloys. The objective of the present study was to assess the cyclic oxidation resistance of FeSiCrNi and FeMnSiCrNiCe alloys in comparison to AISI 304 and AISI 310 stainless steels by evaluating the oxidation kinetics and using char
Mat. Res.. Publicado em: 18/09/2017
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15. The Effect of Cr Content on the Glass Forming Ability of Fe68-xCrxNb8B24 (x =8,10,12) Alloys
Based on the Fe60Cr8Nb8B24 alloy, reported in the literature as good Glass Forming Ability (GFA), in this study the GFA of two new compositions was proposed, Fe68-xCrxNb8B24 (x=10,12). They were evaluated as good candidates to be new compositions of Bulk Metallic Glasses (BMG) with better corrosion resistance due to the high Cr content. Rapidly solidified gl
Mat. Res.. Publicado em: 27/10/2016
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16. Syntheses and Fundamental Properties of Cr/Mo-Adoped Fe-Rich Alloys With Metastable Phase and Saturation Magnetization Near 1.9 T
The Fe-rich alloys of Fe90-xSi5B5Mx (M= Cr or Mo; x=1, 2) are synthesized in the present study. The as-spun structure mainly consists of bcc phase plus a minor amount of metastable phase (Fe3B and/or Fe23B6). Comparing with the base alloy Fe90Si5B5, the corrosion resistance is improved significantly due to the formation of the passive film. Saturation magnet
Mat. Res.. Publicado em: 10/10/2016
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17. Series of Nanocrystalline NiCoAlFe(Cr, Cu, Mo, Ti) High-Entropy Alloys produced by Mechanical Alloying
Abstract The mechanical alloying technique was employed to produce series of high entropy alloys, combining in equiatomic percentage Al, Co, Cr, Cu, Fe, Mo, Ni and Ti. Milling times were 0, 10, 20 and 30 h, and experiments were performed in a high energy ball mill (SPEX-8000M) under argon atmosphere. The structural and microstructural changes due to mechanic
Mat. Res.. Publicado em: 08/08/2016
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18. Microstructure and Properties of Coating of FeAlCuCrCoMn High Entropy Alloy Deposited by Direct Current Magnetron Sputtering
The coatings of FeAlCuCrCoMn high entropy alloy were deposited by direct current magnetron sputtering. The microstructure and the mechanical and corrosion properties of the coatings are investigated. A perfect dense and smooth coating could be obtained. The coatings exhibit single FCC solid solution as increasing deposited time. The thickness of the coatings
Mat. Res.. Publicado em: 03/06/2016
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19. Comportamiento Tribológico y Microestructural en Recubrimientos Aplicados por GTAW y HVOF (Proceso Térmico de Espreado) y Usado en Recuperación de Aceros Grado Herramienta AISI/SAE D2
Abstract The Fe-Cr-Mo alloys are use in covers to protect the components that are under wear and corrosion. The high velocity thermo spray covering by HVOF (high velocity oxi-fuel) in Fe-Cr-Mo alloys has reported as a good result in projection fields for the steel tool grade for cold work. The HOVF is an attractive method to apply covering and recuperate dia
Soldag. insp.. Publicado em: 2016-06
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20. High Temperature Oxidation Behavior of Yttrium Dioxide Coated Fe-20Cr Alloy
Long term isothermal and cyclic oxidation behavior of yttrium dioxide (Y2O3) coated Fe-20Cr alloy was studied. Oxidation tests were carried out in air for periods of up to 200 hours at 1000°C and the oxidation behavior of the alloy was evaluated gravimetrically. The Y2O3 coating reduced markedly the mass gain of the alloy. Energy dispersive spectroscopic an
Mat. Res.. Publicado em: 12/04/2016
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21. Development of nano-oxide dispersed 304L steels by mechanical milling and conventional sintering
In the present work an attempt has been made to synthesize 304L stainless steels alloy powders with nominal compositions 70.00Fe-19.00Cr-11.00Ni (alloy A), 69.00Fe-19.00Cr-11.00Ni- 1.0 Y2O3(alloy B), and 69.00Fe-19.00Cr-11.00Ni- 1.0 TiO2(alloy C), (all in wt.%) by mechanical milling and conventional sintering at 1150°C for 1.0 hour in argon atmosphere. Exte
Mat. Res.. Publicado em: 19/02/2016
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22. Prediction of Phase Composition and Nitrogen Concentration During the Nitriding Process in Low-Alloy Steel
A diffusion/transformation coupled model has been developed which combines finite difference (FD) model with a phenomenological model. The composition of the different iron-nitrogen(Fe-N) hardening phase can be regard as a function of nitriding time and nitrogen concentration. The diffusion model and transformation model are linked by the limiting nitrogen s
Mat. Res.. Publicado em: 05/02/2016
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23. Production of MA956 Alloy Reinforced Aluminum Matrix Composites by Mechanical Alloying
Aluminum matrix composites (AMC) are attractive structural materials for automotive and aerospace applications. Lightweight, environmental resistance, high specific strength and stiffness, and good wear resistance are promising characteristics that encourage research and development activities in AMC in order to extend their applications. Powder metallurgy t
Mat. Res.. Publicado em: 23/10/2015
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24. Optimization of the Deposition Parameters of HVOF FeMnCrSi+Ni+B Thermally Sprayed Coatings
AbstractHVOF thermal spray process produces coatings with low porosity and low oxide content, as well as high substrate adhesion. Small variations on the parameters of the HVOF process can generate coatings with different characteristics and properties, which also is chemical composition depended of the alloy. FeMnCrSi alloy is a cavitation resistant class o
Soldag. insp.. Publicado em: 2015-06