Thermocalc
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Effect of Rolling Temperature on Microstructure and Mechanical Properties of a Nb-Mo Microalloyed Medium Mn Steel
Warm rolling of medium Mn steel is a promising technology to meet the needs of vehicle weight reduction and energy conservation while ensuring the safety for passengers. In this study, a novel Nb-Mo microalloyed 6.6Mn steel was subjected to a series of warm rolling tests at temperatures ranging from 630 to 690 ºC, based on the thermodynamic-based prediction
Mat. Res.. Publicado em: 11/11/2019
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2. Simulação termodinâmica computacional de liga modelo de aço super ferrítico contendo 0,07% de boro
RESUMO Aços inoxidáveis super ferríticos são utilizados em equipamentos como trocadores de calor e torres de destilação que operam em condições extremas de temperatura, pressão e em ambientes contendo altas concentrações de cloretos, H2S e CO2, encontradas nas novas áreas de exploração de petróleo e gás na costa brasileira. Uma liga super fer
Matéria (Rio J.). Publicado em: 20/05/2019
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3. Effect of Aging Heat Treatment H950 and H1000 on Mechanical and Pitting Corrosion Properties of UNS S46500 Stainless Steel
The effect of aging temperature on mechanical and pitting corrosion properties of UNS S46500 was investigated. Tensile and Hardness tests were carried out and the microstructure was analyzed by optical microscopy, scanning electron microscopy and X-ray diffraction; Thermo-Calc simulations helped in the phase identification. Pitting corrosion properties were
Mat. Res.. Publicado em: 08/11/2018
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4. Development of Synthetic Slag with Marble Waste and Calcium Aluminate Agents for Cast Iron Desulfurization
The aim of this work was to study the use of slags to desulfurize cast iron. It was proposed to use alumina instead of fluorspar. In addition, marble waste was used instead of lime. Simulations applying Thermo-Calc® software were carried out in order to obtain the theoretical phases using thermodynamic data. Then, a comparison between theoretical data and e
Mat. Res.. Publicado em: 13/07/2017
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5. Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation
The phase field model based on the nonlinear Cahn-Hilliard equation was applied to analyze the spinodal decomposition process in Al-Zn and Al-Zn-Cu alloys. Partial differential equations were solved using the explicit finite difference method for the Al- 20, and 35 at. % Zn alloys aged at temperatures between 25 and 100 °C for times from 10 s to 2000 s and
Mat. Res.. Publicado em: 20/03/2017
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6. Ferrite Quantification Methodologies for Duplex Stainless Steel
ABSTRACT In order to quantify ferrite content, three techniques, XRD, ferritoscope and optical metallography, were applied to a duplex stainless steel UNS S31803 solution-treated for 30 min at 1,000, 1,100 and 1,200 °C, and then compared to equilibrium of phases predicted by ThermoCalc® simulation. As expected, the microstructure is composed only by austen
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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7. Analytic Approach to Alloys Thermodynamics: Ternary Cu-Ga-Ni system
In this paper are presented the results of the calculation of thermodynamic properties in liquid state for ternary Cu-Ga-Ni alloys using the newest version of general solution model. Calculation was carried out in temperature interval 1473-2073 K, along 3 cross sections from corner of each metal, with ratios between two other metals 1:3, 1:1 and 3:1. Partial
Mat. Res.. Publicado em: 18/08/2016
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8. Electron microprobe Th-U-Pb monazite dating and metamorphic evolution of the Acaiaca Granulite Complex, Minas Gerais, Brazil
Abstract The Acaiaca Complex (AC) is located in southeastern Minas Gerais state, and comprises felsic, mafic, ultramafic, and aluminous granulites as well as lower grade gneisses and mylonites. The complex is distributed over an area of ca. 36 km by 6 km, surrounded by amphibolite facies gneisses of the Mantiqueira Complex (MC). The discrepancy in the metamo
Rem: Rev. Esc. Minas. Publicado em: 2016-03
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9. Aplicações e limitações da termobarometria em migmatitos e granulitos usando como exemplo as rochas do Orógeno Araçuaí no Sul da Bahia, incluindo discussão do significado tectônico dos resultados
No sul da Bahia ocorrem migmatitos e granulitos do Complexo Jequitinhonha, porção norte do Orógeno Araçuaí. Os migmatitos (granada-cordierita diatexitos) dominam as rochas metamórficas e incluem lentes e camadas de granada granulito félsico. As condições de temperatura e pressão do metamorfismo foram calculadas com termobarometria convencional e TH
Braz. J. Geol.. Publicado em: 2015-12
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10. Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool
Steelmaking slag and residues from granite cuttings are industrial wastes with considerable production, however limited applications. This work studied an inertization and recovery process of such wastes as raw materials into production of rock wool (i.e. a thermo-acoustic insulator with growing market). Several batches were produced aiming the chemical prop
Mat. Res.. Publicado em: 2015-02
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11. Análise de dessulfuração de ferro-gusa com misturas do CaO-Fluorita e CaO-Sodalita com o uso de termodinâmica computacional
Esse trabalho tem como objetivo o uso da termodinâmica computacional no estudo de dessulfuração de ferro-gusa com misturas de CaO-Fluorita e CaO-Sodalita. As experiências foram realizadas com a adição de diferentes misturas a partir desses sistemas em ferro-gusa a uma temperatura de 1,400ºC. Os resultados do teste foram analisados e comparados com os
Rem: Rev. Esc. Minas. Publicado em: 2013-12
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12. Desenvolvimento do aço inoxidável super-duplex UNS S 32760 produzido em barras laminadas de grande diâmetro
Os aços inoxidáveis superduplex, atualmente, são materiais importantes para a indústria de óleo e gás, especialmente para produção off-shore. Em águas profundas, a confiabilidade do sistema de produção é muito importante. A resistência à corrosão dos aços inoxidáveis duplex de alta liga com alto teor de Mo e N, especialmente em relação à
Rem: Rev. Esc. Minas. Publicado em: 2013-06