Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"EBSD"”.
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Determination of special boundary coordination at quadruple nodes using EBSD
Grain boundaries are known to play an important role in materials properties including corrosion and cracking resistance. Some grain boundaries are resistant to corrosion and cracking and are known as "special" boundaries. While the structure of individual grain boundaries is important, the …
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Architettura e meccanismi di costruzione di complessi granitoidi post-collisionali: studio integrato di terreno, microstrutturale, AMS ed EBSD del Batolite tardo varisico delle Serre (Calabria meridionale)
Questa tesi di dottorato, basata su un approccio multidisciplinare che integra dati di terreno, microstrutturali, AMS e CPO, ha permesso di aggiungere nuovi significativi vincoli sull'architettura del Batolite delle Serre, di età tardo varisica, e sul legame tra la costruzione dello stesso e …
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Investigation of an electron-beam sustained discharge in helium
… into an Electron-Beam Sustained Discharge (EBSD) confined within an electrically insulating cylindrical discharge tube are presented. The study is directed toward discharges in helium where radial ambipolar diffusion is the dominant plasma loss mechanism. This investigation is made in …
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Insights into magmatic processes from the crystal orientation mapping of igneous microstructures
… using electron backscatter diffraction (EBSD) has revolutionised the study of deformed rocks, and is now emerging as a useful tool for studying igneous rocks. In this thesis, I combine EBSD with field, petrographic and geochemical observations to tackle long-standing problems in igneous …
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High-Resolution Characterization of Micro-Scale Crack Tip Fields in Zirconium
… resolution electron backscatter diffraction (HR-EBSD) and high (spatial) resolution digital image correlation (HR-DIC), are used in combination with crystal plasticity-based finite element (CPFE) analysis for the facture studies. The current dissertation is presented in a manuscript format. …
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Untersuchung von alpha -> gamma Mikrotransformationstexturen in Stahl mittels Orientierungsmikroskopie im hochauflösenden Rasterelektronenmikroskop
… carbon micro-alloyed steel was studied by SEM-EBSD (scanning electron microscope based electron back scattered diffraction). The former involved complete or partial transformation of ferrite to austenite to get access to different steps of the transformation. By means of a special preparation …
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Deformation and Its Effect on Recrystallization in Magnesium Alloy AZ31
… (OM), Electron Backscattered Diffraction (EBSD), Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD). The results revealed significant activity of basal and non-basal slip as well as twinning. The twins were mainly of the contraction and double-twin (contraction-extension) …
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Low Temperature Cleavage Fracture of Microalloyed Bainitic Plate Steels
… (SEM) and electron back scattered diffraction (EBSD). Quantitative data was obtained for prior austenite grain (PAG) size, volume fractions of two bainite types (conventional bainite and acicular ferrite) and EBSD 15° domain size. Charpy impact tests (using two notch orientations) were carried …
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Characterization of Stresses and Strains Involved in the Martensitic Phase Transformations
… namely: electron backscatter diffraction (EBSD), high-resolution digital image correlation (HRDIC) and in situ neutron diffraction. It is shown here that applied stress favours the formation of strain-induced martensite in certain orientations of austenite. Crystallographic information …
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Seismic anisotropy in siliciclastic reservoir rocks
… backscattered diffraction (SENI-EBSD), quantitative X-ray diffraction (QXRD), image analysis, ultrasonic velocity measurements, palaeomagnetism, anisotropic magnetic susceptibility, and numerical modelling are combined to elucidate the controls of the elastic anisotropy of …
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Embrittlement and Flow Localization of Reactor Structural Materials
… utilizing finite element method (FEM) and EBSD misorientation map for unirradiated and irradiated 316L stainless steel. The major issue of interest is the possibility that low ductility, often found following irradiation exposure, will translate into low notch toughness. The influence of …
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Evolução das tensões residuais e sua relação com a “misorientação” microestrutural de um aço astm dh36 após soldagem
… with backscattered electron diffraction (SEM-EBSD) technique were used. One of the relevant experimental procedures for the verification of the thesis involved the simulation of the sample for two hours and its subsequent placement in a vacuum chamber of the SEM, and then the microstructure …
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Mikrotextur und magnetische Mikrostruktur in Hartmagneten aus (Nd,Pr)2Fe14B-Verbindungen
… Nd2Fe14B- und Pr2Fe14B-Basis, untersucht. Die EBSD-Technik (electron backscatter diffraction) wurde für Sintermagnete und für feinkristalline, warmumgeformte Magnete auf Nd2Fe14B-Basis erstmals erfolgreich eingesetzt, um eine quantitative Texturanalyse durchzuführen. Die Polfiguren des hoch …
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Tracking multistage deformation within an ultrahigh-pressure terrane: zircon and monazite microstructures and petrochronology from shear zones of the Western Gneiss Region, Norway
… abundances, Ti-in-zirconthermometry, and EBSD data from zircons and monazites to investigate the timing ofUHP metamorphism, exhumation, and deformation during these events. Samples werecollected from eclogites, orthogneisses, and paragneisses within five tens-of-meters scaleshear zones …
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Influence of Mechanical Loading and Temperature on the Magnetic Properties of FeCo-2V Soft Magnetic Alloy
… (DIC), Electron Backscatter Diffraction (EBSD), synchrotron X-ray diffraction, Single Sheet Tester (SST) measurements, and magnetic loss analysis, this work offers a multiscale perspective on the relationship between mechanical deformation, microstructural evolution, and magnetic …
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Termomechanická únava austenitických ocelí
… technikou difrakce zpětně odražených elektronů (EBSD). Různé mechanismy iniciace únavových trhlin byly pozorovány pro zatěžování ve fázi a mimo fázi. Je diskutován vliv druhu zatěžování na mechanismus poškození a únavovou životnost.
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Microstructural Characterization of 3D Deposited Metal Structures
… polymer template. The foam was prepared for EBSD using modification to standard metallography techniques. The average grain size was 5.73 µm with a random texture, suggesting a heat treatment used to remove the polymer template. Secondly, we studied mesoporous nickel samples. A measure of …
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The Role of Slip System Activation on Ni-Based Superalloy High Temperature Fatigue
… the work of previous research by using SEM and EBSD imaging to characterize the microstructure of IN-718 specimens before and after preconditioning. The microstructure grains and their orientations before preconditioning were found for a distinct area of interest using EBSD. Following the …
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Mechanical Testing and Characterization of Proposed Copper Materials for the Disposal of Used Nuclear Fuel Waste
… (SEM) and electron backscatter diffraction (EBSD) imaging, tensile tests, and micro-computed tomography (MicroCT). The findings presented in this thesis highlight the significant impact of heat treatment on the mechanical properties of CS material, markedly reducing porosity and internal …
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