Solidification
Mostrando 1-12 de 276 artigos, teses e dissertações.
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1. Behavior of the effective heat transfer coefficient and global thermal resistance in freezing of fruit juice model solutions in cylindrical packages
Abstract In this study the effect of packing on freezing time, effective heat transfer coefficient and global thermal resistance were evaluated during the freezing of fruit juice model solution in an air blast freezer. Two configurations were arranged with 40 buckets and 15 kg of solution in each, totaling 600 kg. Thermocouples were installed to monitor the
Food Sci. Technol. Publicado em: 2020-12
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2. Effect of Sigma Phase Precipitated at 850 °C on Corrosion Behaviour of UNS S82441 Duplex Stainless Steel
ABSTRACT Duplex stainless steels (DSS) are alloys with binary microstructure consisting of ferrite (δ) and austenite (γ), combining high mechanical properties and corrosion resistance by pitting and stress corrosion, due to the two phases austenite/ferrite. However, the formation of secondary and intermetallic phases, during solidification processes, heat
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Diameter Dependence of Magnetic Properties of Co-based Metal Fibers
Naked Co68.25Fe4.5Si12.25B15 metal fibers with diameter from 25 µm to 100 µm are produced by melt extraction method. Significant diameter dependence of magnetic properties is studied. Their microstructure and magnetic properties of hysteresis loops and giant magneto impedance (GMI) effect at frequencies from 0.1MHz to13MHz are investigated. The results sho
Mat. Res.. Publicado em: 09/09/2019
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4. Influence of Directional Solidification on the Mechanical Properties of Cu-Al-Be-Nb-Ni Alloy
Copper-based polycrystalline shape memory alloys (SMAs) have limitations for many practical applications due to their low superelasticity and low ductility. In order to overcome this situation, in recent years, the production of copper-based SMAs by directional solidification process has attracted the interest of many researches. In this sense, the present w
Mat. Res.. Publicado em: 05/09/2019
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5. Phase-Field Simulation for Non-isothermal Solidification of Al-Cu Binary Alloy
Based on the principle of dilute solution approximation, a phase field model for dendritic growth during the non-isothermal solidification process was proposed by coupling the phase field, concentration field and temperature field, and was adopted to investigate the dendritic growth of Al-Cu binary alloy during the non-isothermal solidification process. Also
Mat. Res.. Publicado em: 02/09/2019
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6. Investigation of Thermal Parameters Effects on the Microstructure, Microhardness and Microsegregation of Cu-Sn alloy Directionally Solidified under Transient Heat Flow Conditions
The microstructure and mechanical properties of cast materials are strongly dependent on the thermal history during solidification process. The global casting industry has faced major challenges, i.e., customers increasingly demand completely finished cast parts as well as complexity of casting alloys are rising. Therefore, the previous knowledge the solidif
Mat. Res.. Publicado em: 19/08/2019
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7. Microstructure evolution during the extrusion of a 6351 aluminum alloy tube
Abstract The aluminum alloy AA 6351 is a precipitation hardened alloy of the Al-Mg-Si system, additionally containing Mn and Fe. In this study, the microstructural characterization during processing of a thick wall extruded AA 6351 tube was carried out. Several complementary techniques for microstructural characterization were used, such as polarized light o
REM, Int. Eng. J.. Publicado em: 19/06/2019
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8. Solidification Furnace Developed for Sounding Rockets: Rio Verde Mission
ABSTRACT Brazil has a Microgravity Program mainly based on experiments using sounding rockets. Up to now, four missions have been carried out with approximately 35 experiments submitted in total. In all flights, the Associate Laboratory of Sensors and Materials of the Brazilian Space Research Institute (LABAS/INPE) participated with a fast solidification fur
J. Aerosp. Technol. Manag.. Publicado em: 03/06/2019
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9. Social determinants of a Quilombola Community and its interface with Health Promotion
RESUMO Objetivo: Compreender a relação dos determinantes sociais na Promoção da Saúde de mulheres quilombolas. Método: Pesquisa participativa, desenvolvida por meio do Itinerário de Pesquisa de Paulo Freire, que compreende três etapas: investigação temática, codificação e descodificação e desvelamento crítico. Essas etapas foram desenvolv
Rev. esc. enferm. USP. Publicado em: 30/05/2019
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10. Influência da porosidade em algumas propriedades mecânicas da liga de Al-6,5%Si-0,6%Mg fundida e tratada termicamente
RESUMO As ligas de Al-Si-Mg são atualmente as mais utilizadas para obtenção de peças fundidas comerciais, isto porque as propriedades mecânicas desses materiais podem ser melhoradas através de tratamentos térmicos. No entanto, cabe salientar que nas peças fundidas de ligas de alumínio, a porosidade é o defeito que ocorre mais frequentemente. Esse d
Matéria (Rio J.). Publicado em: 20/05/2019
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11. Effects of Forming Processes on Microstructures and Mechanical Properties of A356 Aluminum Alloy Prepared by Self-inoculation Method
Semisolid slurry of A356 aluminum alloy was prepared by Self-Inoculation Method (SIM), and the microstructures and solidification behavior of rheo-forming process in different forming processes were researched. The results indicate that semisolid slurry of A356 aluminum alloy can be prepared by Self-Inoculation Method at 600ºC. Primary α-Al particles with
Mat. Res.. Publicado em: 11/04/2019
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12. Effect of Sn Addition in the Microstructure Refinement and Corrosion Resistance of Cu-Zr-Al-Ag Alloy
In this paper, a composition of known high glass-forming ability, Cu42Zr42Al8Ag8 and a novel Cu42Zr42Al8Ag4Sn4, were produced by suction-casting. After rapid solidification of both alloys, X-ray diffraction patterns along with crystallite size estimation by Scherrer equation and scanning electron microscopy images revealed a refined microstructure, composed
Mat. Res.. Publicado em: 04/04/2019