Abnormal Grain Growth
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Growth and yield parameters of white oat and wheat as affected by canola residues
ABSTRACT Despite being an important crop option for Brazilian agriculture, canola has some characteristics that may limit its insertion in some cropping systems, such as its allelopathic effects. Thus, the present work aimed to study the effect of canola crop residues on the seed germination, growth and grain yield of white oat and wheat plants. In laborator
Rev. Ceres. Publicado em: 02/12/2019
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2. Improvement of Texture and Magnetic Properties in 4.5 wt.% Si Grain-Oriented Electrical Steels
4.5 wt.% Si grain-oriented electrical steel sheets were successfully produced by hot rolling, normalizing, warm rolling and annealing, and texture evolution was investigated using macro- and micro-texture analysis. It is found that the recrystallization texture of sheets is very sensitive to the warm rolling reduction, and 83-87% warm rolling reductions are
Mat. Res.. Publicado em: 19/08/2019
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3. Estabilidad térmica de aleaciones de magnesio Procesadas por Friccion-Agitación (FSP)
ABSTRACT Superplasticity is defined by an extended plastic deformation previous to fracture, generally at high temperatures. In the mode of fine structures superplasticity, grain boundary sliding is the controlling mechanism. To achieve this fine grained structure it could be used any Severe Plastic Deformation (SPD) process like Friction Stir Processing (FS
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Efectos de la aplicación de tratamientos isotérmicos sobre el tamaño de grano y la dureza de aleaciones de aluminio AA5083-H116
ABSTRACT In this work is studied the relationship between morphological characteristics of grain and hardness of aluminum alloys AA5083-H116, which has been submitted to several isothermal treatments. For analysis development were used optical and scanning electron microscopy, chemical microanalysis, hardness measurements, differential scanning calorimetry (
Matéria (Rio J.). Publicado em: 02/05/2017
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5. Dip coating of a carbon steel sheet with Ni reinforced TiO2 nanoparticles
In this work carbon steel plates were dip-coated with a composite film obtained from a colloidal suspension of Ni-TiO2. Suspensions with different solids contents were used to evaluate the adherence of the film and the microstructural features. The samples were characterized using both optical and scanning electron microscopy, energy dispersive spectroscopy
Mat. Res.. Publicado em: 12/04/2016
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6. Topological and metrical aspects of normal and abnormal grain growth
Grain growth theories normally describe a grain using the concept of ‘grain radius’. However, this assumption bypasses all topological information relating to the grain, viz., the number of its faces, edges, etc. This study, by contrast, introduces a new methodology, treating normal and abnormal grain growth in three dimensions in terms of both metrical
Materials Research. Publicado em: 2007-12
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7. Efeitos do tratamento térmico de solubilização sobre o crescimento de grão e o grau de sensitização dos aços inoxidáveis austeníticos AISI 321 e AISI 347 / Effects of thermal treatment of solubility on growth grains and degree of sensization of the steel AISI 321 and AISI 347.
Os aços inoxidáveis austeníticos apresentam alta resistência à corrosão sob vários meios agressivos, sendo por isto largamente utilizados no setor industrial. Estes aços quando submetidos a determinados intervalos de temperatura podem sensitizar, devido à precipitação de carbonetos de cromo nos contornos dos grãos, tornando-se susceptíveis à co
Publicado em: 2007
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8. Crescimento de grãos anômalos em titanato de bário. / Abnormal grain growth in barium titanate.
Barium Titanate (BaTiO3) and derived material are extensively used in the manufacture for a large range of electronic components like multilayer ceramic capacitors (MLCC), semi-conductor devices, PTCR (positive temperature coefficient resistor) and electro-optic devices. Advanced ceramic powders preparation is playing an important role in modern ceramic rese
Publicado em: 2004
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9. Características estruturais, microestruturais, dielétricas e piroelétricas de cerâmicas de Sr xBa1-X Nb2O6 forjadas a quente
The texturing process and the characterization of textured Sr xBa1-xNb2O6 (x = 0.5; x = 0.6) ferroelectric ceramics were investigated. The ceramic bodies were fabricated through two stage sintering. The first and second stage consisted in conventional firing and hot forging of the ceramic bodies, respectively, both at oxygen atmosphere. The forged ceramics a
Materials Research. Publicado em: 2003-12
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10. Interaction Between Second-Phase Particle Dissolution and Abnormal Grain Growth in an Austenitic Stainless Steel
The continuing development of stainless steels has resulted in complex steel compositions with substantial amounts of alloying elements. The benefits of such additions invariably come attached to unavoidable disadvantages. One of the most critical item is the potential microstructural instability of the material. Alloying elements may be in a supersaturated
Materials Research. Publicado em: 2002-09
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11. Neural Disturbances in Chickens Caused by Dietary T-2 Toxin1
Graded concentrations of dietary T-2 toxin (0, 1, 2, 4, 8, and 16 μg/g) were fed to groups of 40 chickens. T-2 toxin was found to cause an abnormal positioning of the wings, hysteroid seizures, and impaired righting reflex in young chickens. The abnormal wing positioning occurred spontaneously or as the result of dropping from a height of 1 meter. The seizu