scholarly journals Carta ao leitor (Letter to the reader)

2020 ◽  
Vol 14 ◽  
pp. 3901001
Author(s):  
Aline Maria de Medeiros Rodrigues Reali
Keyword(s):  
Rolling Pass

AbstractLetter to the reader, v. 14, Jan./Dec. 2020, continuous publishing (rolling pass).ResumoCarta ao leitor, v. 14, jan./dez. 2020, publicação contínua.Keywords: education, continuous publishing (rolling pass)Palavras-chave: revista eletrônica de educação, publicação contínua.e3901001

Effect of Roll Gap Geometry on the Evolution of Strain States and Textures during Asymmetrical Rolling in AA 1050

2006 ◽  
Vol 116-117 ◽  
pp. 417-420 ◽  
Author(s):  
Moo Young Huh ◽  
Hyung Gu Kang ◽  
C.K. Kang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
The Finite Element Method ◽  
Asymmetrical Rolling ◽  
Rolling Pass ◽  
Random Texture ◽  
Roll Gap ◽  
Element Method

Asymmetrical rolling was performed by rolling AA 1050 sheets with different velocities of upper and lower rolls. In order to study the effect of roll gap geometry on the evolution of strain states and textures during asymmetrical rolling, the reduction per rolling pass was varied. After asymmetrical rolling, the outer thickness layers depicted shear textures and the center thickness layers displayed a random texture. With decreasing reduction per an asymmetrical rolling pass, the thickness layers depicting shear textures increases. The strain states associated with asymmetrical rolling were investigated by simulations with the finite element method (FEM).

THE EFFECTS OF ACCUMULATIVE ROLL BONDING PROCESS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF IF STEEL

2008 ◽  
Vol 22 (18n19) ◽  
pp. 2866-2873 ◽  
Author(s):  
SAEED TAMIMI ◽  
MOSTAFA KETABCHI ◽  
NADER PARVIN
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Accumulative Roll Bonding ◽  
Low Carbon Steel ◽  
Rolling Process ◽  
Low Carbon ◽  
Roll Bonding ◽  
Rolling Pass ◽  
Steel Strips ◽  
Wire Brushing

This work aims to investigate whether accumulative roll bonding (ARB) is an effective grain refinement technique for ultra-low-carbon steel strips containing 0.004% C. For this purpose, a number of ARB processes were performed at 500 °C, with 50% reduction in area of each rolling pass. It was found that both the ultimate grain size achieved, as well as the degree of bonding, depend on number of rolling pass and reduction of area as a whole. The mean grain size was obtained using AFM was about 130nm. The mechanical properties after rolling and cooling were obtained. Also, the fracture surfaces were studied by Scanning Electron Microscopy (SEM). It was concluded that metal's tensile strengths increased by 334% while the ductility dropped from a prerolled value of 50.5% to 2.6%. Effect of wire brushing on samples observed too. It increased on the wire brushed sheet for 7 HV. The rolling process was stopped when cracking of the edges became pronounced.

scholarly journals Editorial

2018 ◽  
Vol 9 (3) ◽  
pp. 479-484
Author(s):  
Joyce Wassem
Keyword(s):  
Paulo Freire ◽  
Rolling Pass

A revista Educação em Perspectiva, em seu v. 9, n. 3, setembro a dezembro de 2018, apresenta o Dossiê: “Pedagogia do Oprimido: 50 anos de resistência”, organizado pelo Prof. Dr. José Eustáquio Romão. O Dossiê é composto por um conjunto de nove artigos de autores brasileiros e estrangeiros que tomam a obra “Pedagogia do Oprimido” de Paulo Freire como objeto de diversificadas análises, seja a partir de uma discussão epistemológica, de sua prática pedagógica e/ou de seu espaço no âmbito das políticas públicas educacionais. Trata-se de um importante e oportuno debate em nosso contexto educacional, político e econômico, marcado por retrocessos e pela inflexão de direitos historicamente constituídos. Além de ser uma homenagem pelo cinquentenário da obra “Pedagogia do Oprimido” de Paulo Freire, um educador brasileiro que tanto contribuiu/contribui para a educação, não apenas brasileira, mas por ser exatamente no Brasil, onde tem encontrado tanta resistência à sua obra e suas ideias, especialmente por trazer para a cena as oprimidas e os oprimidos que sempre estiveram à margem da sociedade.Além dos artigos apresentados no Dossiê, esse número da revista Educação em Perspectiva conta com dez artigos em fluxo contínuo e um relato de experiência.Aproveitamos para informar algumas novidades na Revista Educação em Perspectiva. Uma delas é que, a partir do volume 10 de 2019, a revista passará a adotar o sistema de Publicação Contínua (Rolling Pass), com a finalidade de tornar a publicação dos manuscritos mais célere. Outra é que a revista passará a ter publicação bilíngue – Português e Inglês - de todos os seus textos, dando assim mais um passo em direção ao seu processo de internacionalização. Uma terceira novidade é que a revista passará a compor o Portal de Periódicos da Universidade Federal de Viçosa (UFV). Agradecemos ao Prof. Dr. José Eustáquio Romão pela organização do Dossiê: “Pedagogia do Oprimido: 50 anos de resistência”, aos pareceristas e aos autores e autoras dos trabalhos publicados.Aos leitores e leitoras almejamos que os manuscritos instiguem profícuas leituras e debates.

scholarly journals Editorial: Competência, Inovação e Tendências na Biblioteconomia

2019 ◽  
Vol 17 ◽  
pp. 1-15
Author(s):  
Gildenir Carolino Santos ◽  
Paloma Porto ◽  
Danille Thiago Ferreira
Keyword(s):  
Rolling Pass

Chegamos ao final do ano, concluindo mais um volume da RDBCI, que neste ano de 2019 passou a ter publicação contínua, o que acelerou a publicação de trabalhos inéditos, valorizando o ritmo da ciência e do acesso aberto. Nesta edição o tema é Competência, Inovação e Tendências na Biblioteconomia e Ciência da Informação, além de Ciência, Dados e Acesso Abertos. A modalidade de publicação contínua (rolling pass), ou simplesmente PC, criada a um certo tempo no continente europeu, e agora ganhando espaço nas Américas, é a publicação dos artigos em um único volume sem pausas periódicas, sem a espera do fechamento de um número para publicar outro, o que pode diminuir a visibilidade dos artigos, e ganhando mais impacto na consulta e citações dos artigos. (RODRIGUES; SANTOS, 2019).

Effect of Rolling Process on the Microstructure of AlMgSi Alloy

2011 ◽  
Vol 399-401 ◽  
pp. 40-45
Author(s):  
He Liang Li ◽  
Xiao Guang Yuan ◽  
Ming Fu Wu ◽  
Hong Jun Huang
Keyword(s):  
Reduction Rate ◽  
Rolling Process ◽  
Alloy Sheet ◽  
Second Phase ◽  
Rolling Pass ◽  
Second Phase Particles ◽  
Deformation Inhomogeneity ◽  
Hot And Cold Rolling ◽  
Process Combination ◽  
Almgsi Alloy

In this paper, a AlMgSi alloy for sheet materials was designed on the base of 6111 aluminum alloy, the alloy sheet was fabricated by the rolling process combination of hot and cold rolling, the effect of rolling process on the microstructure of alloy was studied. The results show that different 1st rolling pass reductions of 13%, 33% and 47%, alloy microstructure changes obviously. With the increasing of 1st rolling pass reductions, the re-crystallization structure grow in quantity, re-crystallization grain more and more dense, flat, uniform, and the second phase particles are also more small, distributes more uniform. When the first cold rolled reduction is 47%, degree of grain refinement, the second phase particles fragmentation and tissue uniformity in rolling 3st state are obviously superior to the 1st state and 2st states. The deformation inhomogeneity can be overcome by improving the first reduction rate, the re-crystallization process of synchronization between surface layer and the center layer is better.

scholarly journals Effects of rolling-pass reduction on microstructural evolution and mechanical properties of SUS316LN stainless steel

2020 ◽  
Vol 50 ◽  
pp. 765-770
Author(s):  
Hiromi Miura ◽  
Masakazu Kobayashi ◽  
Norimitsu Koga ◽  
Chihiro Watanabe
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Microstructural Evolution ◽  
Rolling Pass

Formation of Microstructure and Texture in Intercritically Rolled C-Mn Steel

2007 ◽  
Vol 539-543 ◽  
pp. 4363-4368 ◽  
Author(s):  
Roumen H. Petrov ◽  
Leo Kestens ◽  
Yvan Houbaert
Keyword(s):  
Rolling Temperature ◽  
Accelerated Cooling ◽  
Orientation Relationships ◽  
Rolling Schedule ◽  
Rolling Pass ◽  
Final Rolling Temperature ◽  
Intercritical Region ◽  
Final Rolling ◽  
Mn Steel ◽  
Ferrite Grain Size

Series of trials were conducted on a laboratory rolling mill to evaluate the influence of intercritical rolling on the microstructure and texture of steel with 0.082%C, 1.54% Mn, 0.35% Si, 0.055%Nb and 0.078%V. Two parallel rolling schedules A and B were designed on the base of the experimentally deduced CCT diagram of the steel. In rolling schedule A the material was subjected to accelerated cooling and coiling simulation after final rolling in the intercritical region, whereas in rolling schedule B the last rolling pass in the intercritical region was replaced by a water quench at the same temperature of the intercritical rolling pass in schedule A. Microstructure and texture were characterized by means of light optical microscopy, scanning electron microscopy, EBSD and XRD. It was found that the average grain diameter and the texture depend significantly on the final rolling temperature in the intercritical region. The decrease of the intercritical rolling temperature leads to an increase of the {111}〈uvw〉 /{001}〈uvw〉 ratio, but at the same time the increase of the average ferrite grain size was also observed. A phenomenological model based on the K–S orientation relationships was used to predict the texture formation in the intercritical region.

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