Rem-revista Escola De Minas
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Published on Jun 1, 2016in Rem-revista Escola De Minas
Clayton Pereira Dias1
Estimated H-index: 1
(Federal University of São Carlos),
Oscar Balancin11
Estimated H-index: 11
(Federal University of São Carlos)
The need for materials with higher strength and corrosion resistance in corrosive environments, such as in the oil extraction in saline media, has led to the use of super duplex stainless steels in projects such as the Pre-sal. The manufacture of these materials involves the step of thermomechanical processing, whose performance depends on the workability of the material. Processing conditions in which the super duplex stainless steel UNS S32760 can be worked safely and in which the material can...
2 Citations Source Cite
Published on Jun 1, 2016in Rem-revista Escola De Minas
Júnia Soares Alexandrino , Antônio Eduardo Clark Peres17
Estimated H-index: 17
(Universidade Federal de Minas Gerais)
+ 1 AuthorsOtávia Martins Silva Rodrigues1
Estimated H-index: 1
(Universidade Federal de Ouro Preto)
The dispersion degree of the mineral particles in the pulp is especially relevant regarding the performance of the cationic reverse flotation of iron ores. The gangue minerals should remain dispersed while hematite particles should be selectively flocculated. The present study addressed determinations of dispersion degree and zeta potential of hematite in the presence of different dispersants, classified as organic polymeric (natural and synthetic), organic monomeric, and inorganic. Special atte...
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Published on Jun 1, 2016in Rem-revista Escola De Minas
Vanessa de Freitas Cunha Lins12
Estimated H-index: 12
(Universidade Federal de Minas Gerais),
Fernando C. Lage1
Estimated H-index: 1
(Universidade Federal de Minas Gerais)
+ 2 AuthorsTulio Matencio13
Estimated H-index: 13
(Universidade Federal de Minas Gerais)
A practice used to prevent corrosion in buried slurry pipelines is the hibernation of pipelines with an aqueous solution containing corrosion inhibitors before beginning the mining operation. The aim of this work is to evaluate the corrosion resistance of API 5L X70 steel used in the slurry pipelines in hibernation solution containing sodium sulphite, sodium hydroxide and glutaraldehyde in a synthetic river water. The electrochemical techniques used are the Tafel analysis and electrochemical imp...
1 Citations Source Cite
Published on Jun 1, 2016in Rem-revista Escola De Minas
Fabrício Mendes Souza3
Estimated H-index: 3
,
Angelo Fernando Padilha20
Estimated H-index: 20
(University of São Paulo)
+ 1 AuthorsDierk Raabe85
Estimated H-index: 85
(Max Planck Society)
Electron backscatter diffraction (EBSD) and electron channeling contrast imaging (ECCI) were used to examine microstructural changes of the austenitic low-density Fe-30.5Mn-8.0Al-1.2C (8Al) and Fe-30.5Mn-2.1Al-1.2C (2Al) (wt.%) steels during cold rolling. As the strain increased, deformation mechanisms, such as stacking faults, slip, mechanical twinning, and shear banding were activated in both steels cold rolled up to strain of 0.69. Only slip was noted in these steels at low strain (e=0.11) an...
2 Citations Source Cite
Published on Mar 1, 2016in Rem-revista Escola De Minas
Gláucia Nascimento Queiroga5
Estimated H-index: 5
(Universidade Federal de Ouro Preto),
Bernhard Schulz14
Estimated H-index: 14
(Freiberg University of Mining and Technology)
+ 4 AuthorsAna Lúcia da Silva1
Estimated H-index: 1
(Universidade Federal de Ouro Preto)
The Capelinha Formation (Macaubas Group) consists of a lower quartzitic unit with metamafic intercalations and an upper metapelitic sequence. It occurs in a complex tectono-metamorphic sector of the Aracuai orogen, where post-collisional collapse-related structures superimposed collisional structures. The garnet-bearing assemblages started crystallization in the collisional deformation stage that formed the main regional foliation around 570 Ma. Garnet porphyroblasts display a well-developed gro...
2 Citations Source Cite
Published on Jun 1, 2016in Rem-revista Escola De Minas
Leonardo Martins Graça2
Estimated H-index: 2
(Universidade Federal de Ouro Preto),
Leonardo Evangelista Lagoeiro7
Estimated H-index: 7
(Federal University of Paraná)
+ 1 AuthorsAntônio Eduardo Clark Peres17
Estimated H-index: 17
(Universidade Federal de Minas Gerais)
In iron ore pelletizing plants a range of process parameters such as particle size distribution, specific surface area, and moisture, must be controlled to achieve optimized operation conditions. Particle size distribution and specific surface area are controlled during the grinding operations. Moisture, however, is controlled during filtration of the ground products. This work investigates the relationship between particle morphology, filter cake moisture and filter capacity. The samples were t...
1 Citations Source Cite
Published on Mar 1, 2016in Rem-revista Escola De Minas
Edgar Batista de Medeiros Júnior1
Estimated H-index: 1
(Universidade Federal do Espírito Santo),
Hanna Jordt-Evangelista5
Estimated H-index: 5
(Universidade Federal de Ouro Preto)
+ 2 AuthorsRodson de Abreu Marques1
Estimated H-index: 1
(Universidade Federal do Espírito Santo)
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 ofca. 36 km by 6 km, surrounded by amphibolite facies gneisses of the Mantiqueira Complex (MC). The discrepancy in the metamorphic grade between both complexes led to the present study aiming to understand the metamorphic history of the AC by means of geothermobarometric cal...
1 Citations Source Cite
Published on Mar 1, 2016in Rem-revista Escola De Minas
Fabrício Mendes Souza3
Estimated H-index: 3
,
Angelo Fernando Padilha20
Estimated H-index: 20
(University of São Paulo)
+ 1 AuthorsDierk Raabe85
Estimated H-index: 85
(Max Planck Society)
Crystallographic textures of the austenitic low-density Fe-30.5Mn-8.0Al-1.2C (8Al) and Fe-30.5Mn-2.1Al-1.2C (2Al) (wt.%) steels were examined during cold rolling by means of electron backscatter diffraction (EBSD) and electron channeling contrast imaging (ECCI). Random oriented grains orient towards Goss- and brass-components along the α-fiber as the strain increased, with activation of slip, mechanical twinning, and shear banding, for both steels. S- and copper-orientations were also observed i...
2 Citations Source Cite
Published on Jan 1, 2015in Rem-revista Escola De Minas
Hamilton José de Mello3
Estimated H-index: 3
(Sao Paulo State University),
Diego Rafael de Mello (Sao Paulo State University)+ 2 AuthorsD. D'Addona6
Estimated H-index: 6
(University of Naples Federico II)
UNESP Universidade Estadual Paulista Julio de Mesquita, Departamento de Engenharia Mecânica
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Published on Mar 1, 2015in Rem-revista Escola De Minas
José Wilmar Calderón Hernández1
Estimated H-index: 1
(University of São Paulo),
Duberney Hincapie Ladino2
Estimated H-index: 2
(University of São Paulo)
+ 1 AuthorsNeusa Alonso Falleiros3
Estimated H-index: 3
(University of São Paulo)
The effect of solution heat treatment on the pitting corrosion resistance of 17Cr-6Mn-5Ni-1.5Cu austenitic stainless steel in 0.6M NaCl aqueous solution was evaluated. UNS S30403 (304L) steel was used as benchmark material. Solution heat treatments (SHT) were conducted at 1010°C, 1040°C, 1070°C and 1100°C. The microstructural characterization revealed the presence of δ-ferrite, especially in the asreceived condition (AR). The SHT decreased the proportion of the ferrite phase. Mnrich precipitates...
4 Citations Source Cite
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