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Showing 1 to 20 of 33 for “"microstructural development"”.
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Microstructural development, phase stability, and toughening in mullite matrix composites
… process. A series of studies were conducted on microstructural evolution, oxidation behavior and toughening mechanisms, in order to extend the knowledge in these areas and provide a basis for the future development of these materials. X-ray diffraction, optical microscopy, high resolution …
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Microstructural development during high strain-rate forging of Ti-6Al-4V
Includes bibliographical references.
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Understanding the role of slag on geopolymer hardening and microstructural development
… curing. A detailed investigation of microstructural development and hardening rate was presented for flyash and slag based geopolymers. Flyash and slag precursors were treated with potassium hydroxide-silicate activator of modulus 1.25 keeping SiO2/K2O = 5.1. For the first time in …
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Microstructural Development and Superconducting Parameters of the YBa2Cu3O7-delta Coated Conductor
… conductors has been considered through the development of a grain network model. As the texture of the superconducting layer is directly influenced by the underlying layers, measurements from the substrate and buffer layers are applied in order to model the orientations of the grains in a …
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Hot formability and microstructural development of spray-deposited Al-Li alloy and composite.
The deformational and microstructural behaviour of the commercial Al-Li alloy 8090 and an 8090 based composite containing silicon carbide particulate has been investigated. The materials were deformed at elevated temperature by the test methods of plane strain compression (PSC) and torsion to …
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Effects of vanadium microalloying of 1080 steel on pearlite transformation kinetics and microstructural development
… assess pearlite transformation rates. A detailed microstructural analysis, utilizing field emission scanning electron microscopy, was performed to measure pearlite ILS and colony size. Grain boundary cementite formation and morphology was evaluated to determine the influence of V in 1080 steel. …
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Effect of titanium on the grain size, forgeability and microstructural development in a microalloyed steel, The
Includes bibliographical references.
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Effect of phase transformations, chemical doping, and matrix constraint on the microstructural development of dicalcium-silicate
The factors controlling the monoclinic ($\beta$) to orthorhombic ($\gamma$) transformation of dicalcium silicate (Ca$\sb2$SiO$\sb4$) at about 490$\sp\circ$C have been studied. This transformation is of interest in portland cement technology because the low temperature $\gamma$ phase is unreactive …
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A MULTISCALE EXPERIMENTAL INVESTIGATION OF MICROSTRUCTURAL DEVELOPMENT, MASS TRANSPORT, AND CARBONATION PHENOMENA IN LOW CLINKER CEMENTITIOUS MATERIALS
Concrete is the most widely used construction material in the world. However, there is a need to develop sustainable concrete mixtures considering that cement production accounts for 5-8% of anthropogenic CO2 emissions. Low-clinker cementitious materials offer enormous CO2 reduction potential due …
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Processing, microstructure and mechanical properties of alumina platelet reinforced 3Y-TZP and mullite composites
… sintered. The effect of the matrix on the microstructural development in the presence of alumina platelets were characterized. A systematic study of the effect of platelet sizes in the ranges 3-5, 5-10, 10-15 and 15-25 microns on the green and fired microstructures in 3Y-TZP composites were …
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Heat treatment and additive effects on microstructure and properties of tetragonal-(2-3 mol%) yttria-stabilized-zirconia
… $\cdot$ Al$\sb2$O$\sb3$) and Zr) in microstructural development, phase stability and mechanical behavior of predominantly-tetragonal (2-3 mol%) yttria-stabilized-zirconia (YSZ) was investigated. Preliminary studies on compositional effects were studied in 2-3 mol% YSZ prepared from a …
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Rapid Solidification and Undercooling of Aluminum-Germanium Alloys: Characterization and Control of Microstructure (Metastability, Metallic Glass, Electron Microscopy)
… of undercooling and cooling rate in the microstructural development of Al-Ge alloys during rapid solidification has been carried out. A new technique has been developed which allows for such determinations to be performed directly in a transmission electron microscope. This technique …
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Microstructural evolution during the homogenization heat treatment of 6XXX and 7XXX aluminum alloys
… step in the processing of aluminum extrusions. Microstructural evolution during homogenization involves elimination of the eutectic morphology by spheroidisation of the interdendritic phases, minimization of the microsegregation across the grains through diffusion, dissolution of the low-melting …
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Modeling Flow-Induced Microstructure of Inhomogeneous Liquid-Liquid Mixtures
… at the microscale. The ability to predict this microstructural evolution has many applications, including controlling properties in polymer blends, predicting earthquake aftershocks, and modeling the flow of biological fluids. In order to model these systems, an exact Stokes flow solution is …
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Microstructural properties of isothermal palm oil crystallization
… aims at understanding the effect of shear on the microstructural development. Both continuous shear during crystallization as well a time limited shear step prior to static crystallization are considered. In conclusion, the third part consists of a case study investigating the role of trans fatty …
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In situ transmission electron microscopy ion irradiations of model iron-chromium alloys
… alloys are used as a model to study the microstructural evolution of defects in irradiated structural steel components of a nuclear reactor. We examine the effects of temperature and chromium concentration on the defect evolution and segregation behavior in the early stages of damage. In …
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Microstructure property development in friction stir welds of aluminim based alloys
… Welding (FSW) is known to result in a complex microstructural development, with features that remain unexplained, such as: the formation of the onion rings structure. Moreover, various microstructural factors have been suggested to control the strength in Al-Mg AA5xxx welds. The influence of …
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Ceramic dielectrics for high energy density capacity application
… relationship between the processing parameters, microstructural development, defect chemistry and electrical properties of titanium oxide (TiO₂) dielectrics for high energy density capacitor applications. The effects of aliovalent dopants on the dielectric properties of TiO₂ ceramics were …
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Influência das rotas de processamento na mesotextura e propriedades mecânicas da superliga de níquel 718
… was performed via EBSD analysis. The microstructural development of the alloy, especially the δ phase precipitation was observed by SEM. Tensile tests were performed in order to evaluate the influence of the microstructure on mechanical properties. The results show that a high …
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