Relevant bibliographies by topics / 3D EBSD

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  1. Journal articles
  2. Dissertations / Theses
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  4. Conference papers
  5. Reports

Academic literature on the topic '3D EBSD'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "3D EBSD"

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Zaefferer, S., and P. Konijnenberg. "Advanced analysis of 3D EBSD data obtained from FIB-EBSD tomography." Microscopy and Microanalysis 18, S2 (July 2012): 520–21. http://dx.doi.org/10.1017/s143192761200445x.

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Williams, REA, A. Genc, D. Huber, and HL Fraser. "Sample Surface Preparation For Traditional EBSD Collection and 3D EBSD Collection." Microscopy and Microanalysis 16, S2 (July 2010): 706–7. http://dx.doi.org/10.1017/s1431927610062574.

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Walde, Caitlin, Roger Ristau, and Danielle Cote. "Automated 3D EBSD for metallic powders." MethodsX 5 (2018): 652–55. http://dx.doi.org/10.1016/j.mex.2018.06.001.

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Khorashadizadeh, Anahita, Myrjam Winning, and Dierk Raabe. "3D Tomographic EBSD Measurements of Heavily Deformed Ultra Fine Grained Cu-0.17wt%Zr Obtained from ECAP." Materials Science Forum 584-586 (June 2008): 434–39. http://dx.doi.org/10.4028/www.scientific.net/msf.584-586.434.

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Obtaining knowledge on the grain boundary topology in three dimensions is of great importance as it controls the mechanical properties of polycrystalline materials. In this study, the three dimensional texture and grain topology of as-deformed ultra fine grained Cu-0.17wt%Zr have been investigated using three-dimensional orientation microscopy (3D electron backscattering diffraction, EBSD) measurements in ultra fine grained Cu-0.17wt%Zr. Equal channel angular pressing was used to produce the ultra fine grained structure. The experiments were conducted using a dual-beam system for 3D-EBSD. The approach is realized by a combination of a focused ion beam (FIB) unit for serial sectioning with high-resolution field emission scanning electron microscopy equipped with EBSD. The work demonstrates that the new 3D EBSD-FIB technique provides a new level of microstructure information that cannot be achieved by conventional 2D-EBSD analysis.
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Ferry, Michael, Wan Qiang Xu, M. Zakaria Quadir, Nasima Afrin Zinnia, Kevin J. Laws, Nora Mateescu, Lalu Robin, et al. "3D-EBSD Studies of Deformation, Recrystallization and Phase Transformations." Materials Science Forum 715-716 (April 2012): 41–50. http://dx.doi.org/10.4028/www.scientific.net/msf.715-716.41.

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A focused ion beam (FIB) coupled with high resolution electron backscatter diffraction (EBSD) has emerged as a useful tool for generating crystallographic information in reasonably large volumes of microstructure. In principle, data generation is reasonably straightforward whereby the FIB is used as a high precision serial sectioning device for generating consecutive milled surfaces suitable for mapping by EBSD. The successive EBSD maps generated by serial sectioning are combined using various post-processing methods to generate crystallographic volumes of the microstructure. This paper provides an overview of the use of 3D-EBSD in the study of various phenomena associated with thermomechanical processing of both crystalline and semi-crystalline alloys and includes investigations on the crystallographic nature of microbands, void formation at particles, phase redistribution during plastic forming, and nucleation of recrystallization within various regions of the deformation microstructure.
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Petrov, Roumen H., Orlando León García, J. J. L. Mulders, Ana Carmen C. Reis, Jin Ho Bae, Leo Kestens, and Yvan Houbaert. "Three Dimensional Microstructure–Microtexture Characterization of Pipeline Steel." Materials Science Forum 550 (July 2007): 625–30. http://dx.doi.org/10.4028/www.scientific.net/msf.550.625.

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The microstructural anisotropy together with the crystallographic texture of an industrial grade of X70 pipeline steel is studied by means of the 3D-EBSD technique known also as EBS3 which was recently developed by FEI. Samples of size 8x10x3mm³ were cut from the middle thickness of an industrial rolled plate and after special sample preparation have been studied in a Nova 600 dual beam scanning electron microscope equipped with a field emission gun and HKL Channel 6 EBSD data collection software for crystallographic orientation, which allows multiple sectioning of the sample in automatic mode and, afterwards reconstruction of both the 3D microstructure and texture of the examined volume. Three scanned zones of different volumes that varied between 15x10x27 4m³ and 16x14x6 4m³ have been examined and the results for the crystallographic orientation, grain shape and grain shape orientation are discussed together with the data for the anisotropy of the Charpy impact toughness of the material.
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Osborn, William, Lawrence H. Friedman, and Mark Vaudin. "Strain Measurement of 3D Structured Nanodevices by EBSD." Microscopy and Microanalysis 23, S1 (July 2017): 1422–23. http://dx.doi.org/10.1017/s1431927617007772.

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Osborn, William, Lawrence H. Friedman, and Mark Vaudin. "Strain measurement of 3D structured nanodevices by EBSD." Ultramicroscopy 184 (January 2018): 88–93. http://dx.doi.org/10.1016/j.ultramic.2017.08.009.

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Wang, Xueli, Yuan Xing, Huilan Huang, Yanjun Li, Zhihong Jia, and Qing Liu. "Growth Directions of Precipitates in the Al–Si–Mg–Hf Alloy Using Combined EBSD and FIB 3D-Reconstruction Techniques." Microscopy and Microanalysis 21, no. 3 (May 8, 2015): 588–93. http://dx.doi.org/10.1017/s1431927615000549.

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AbstractNanobelt-like precipitates in an Al–Si–Mg–Hf alloy were studied using electron backscattered diffraction (EBSD) and focused ion beam (FIB) scanning electron microscopy techniques. One grain of the Al matrix with a near [111] normal direction was identified by EBSD and the three-dimensional (3D) microstructure of nanobelt-like precipitates in this grain was studied using 3D-FIB. Ten growth directions of the nanobelt-like precipitates in the grain were identified.
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Váňa, Rostislav, Jiří Dluhoš, Lukáš Hladík, John Lindsay, and Jenny Goulden. "Novel Setup for High Performance Simultaneous 3D EBSD and 3D EDS Acquisition." Microscopy and Microanalysis 23, S1 (July 2017): 282–83. http://dx.doi.org/10.1017/s1431927617002094.

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Dissertations / Theses on the topic "3D EBSD"

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Mateescu, Nora-Maria Materials Science &amp Engineering Faculty of Science UNSW. "Development of 3D-EBSD and its application to the study of various deformation and annealing phenomena." Publisher:University of New South Wales. Materials Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41541.

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The ability to generate three dimensional (3D) microstructures in solids is of great importance in understanding their true nature, as it eliminates speculation about the spatial distribution of features associated with conventional two dimensional (2D) imaging techniques. There are several recently-developed 3D techniques for determining the spatial distribution of microstructural features, each with a given resolution. There is considerable interest in the development of a specific serial sectioning methodology, termed 3D electron backscatter diffraction (3D-EBSD), which combines a focused ion beam (FIB) with EBSD interfaced to a field emission gun scanning electron microscope. Here, FIB is used as a serial sectioning device for cutting parallel slices of single- and multi-phase materials with a site-specific accuracy of up to 50 nm. Each consecutive slice is mapped by EBSD and the complete dataset combined using advanced computer algorithms to generate a volume of a material whereby the true crystallographic features can be analyzed at submicron resolution. The aims of the thesis was to develop 3D-EBSD into a powerful materials analysis tool and use it to resolve several issues concerning the nature of the deformed state and the nucleation and the growth behaviour of recrystallizing grains. The study commenced with an investigation into the effect of material type (restricted to face centred cubic AI, Cu and Au metallic crystals), FIB milling conditions and EBSD software variables on the quality of EBSD patterns generated on ion-milled surfaces of these materials. The effect of material type on EBSD pattern quality following FIB milling was found to be significant with relatively poor quality EBSD patterns obtained for metals of low atomic number. It was demonstrated, particularly for the high atomic number metals, that moderate FIB milling currents (~1-5nA) generated good quality EBSD maps from a given ion-milled surface. This preliminary work was necessary for balancing the time required for serial sectioning during 3D-EBSD and the generation of sufficient quality EBSD maps from each ion-milled surface. The outcomes of this investigation were applied to two major 3D-EBSD investigations on the microstructural and crystallographic characteristics of: (i) deformation features generated in a cold rolled interstitial free (IF) steel, with particular emphasis on the formation of microbands; and (ii) recrystallization of a cold rolled nickel alloy containing coarse (>1 ??m) silica particles, with particular attention given to the generation of particle deformation zones and their influence on nucleation and growth of recrystallizing grains including particle stimulated nucleation (PSN), twin formation during PSN and the growth behaviour of various types of grain boundary into the deformation microstructure. The foregoing 3D-EBSD studies were significant as they revealed various microstructural and crystallographic features not usually clearly evident in conventional 2D micrographs obtained by either EBSD or optical metallography. For example, the technique demonstrated that microbands in cold rolled IF steel consist of irregular curved surfaces that reconcile findings that microbands straight and aligned parallel to slip planes when viewed in normal direction-rolling direction sections but are wavy in transverse direction-rolling direction sections. Three slip planes were found within the angular range of the curved surface of the microband, which indicates that multiple slip planes are operative during deformation. The work also showed the influence of particle diameter on the misorientations generated within particle deformation zones and clearly showed that particle stimulated nucleation (PSN) occurred at particles greater than 1.5-2 ??m. It was observed that PSN in the nickel sample also generates contiguous grains separated by both coherent and incoherent twin boundaries and, on further growth of these grains into the matrix, the coherent boundary dominates and remains parallel to the primary growth direction of the grains.
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Lövy, Vít. "Získání 3D informací o struktuře vyvíjeného materiálu Si3N4 pro válcovávání legovaných drátů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231720.

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This diploma thesis is devoted to the use of 3D reconstruction using EBSD method for microstructural analysis of silicon nitride ceramic material predetermined for the rolling-mill used in the wire production. Application of this method can be used for the grain structure reconstruction and basic microstructural parameters can be than extracted. The development of a suitable method for 3D reconstruction of the structure of the materials the main aim of this work. There are described the different steps begun by sample preparation from the investigated material trough the optimisation of analysis parameters up to the visualization of the grain structure. New type of sample geometry has been designed which leads to the better and faster observation of the microstructure of ceramic materials. This thesis also describes optimal reconstruction parameters such as the geometry of the assembly used in the microscope without mechanical movement of the sample or the influence of conductive coating prepared via in-situ sputtering of suitable metal, or adjustment of the electron and ion beams. Further are described two options of software which can be used for the final generation of 3D structure information and are assessed their advantages and disadvantages. The effect of the filter setting and other parameters and their influence on the resulting structural parameters are also evaluated.
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Gardiner, Benjamin Robert. "High temperature creep performance of alloy 800H." Thesis, University of Canterbury. Mechanical, 2014. http://hdl.handle.net/10092/9949.

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Investigations on post service material showed that Alloy 800H pigtails from methanol producer Methanex have service lives ranging from 3 to 18 years. Because of this variability in service life, Alloy 800H creep performance was assessed and a new criterion for its procurement developed. The current criterion recommends an ASTM grain size of 5 (72µm) or coarser with no consideration given to grain size distribution, grain boundary types, or grain boundary network topology. Results from the investigation showed that this current criterion may produce variations in steady state creep rates of an order of magnitude between ASTM grain size 1 and 5, and a 2.5 times variation in creep ductility. The ability to accurately reveal grain boundaries and assess grain boundary types is fundamental to the identification and quantification of coherent twin boundaries, and the measurement of average grain size and grain size distribution. EBSD mapping has the ability to distinguish grain boundary types using crystal orientation measurement. Grain size measurement from optical micrographs relies on morphological indicators to identify coherent twins. However, it is shown that many of the boundaries observed as straight line morphology on 2D sections did not possess {111} (coherent) interfaces. 3D reconstructions of Alloy 800H revealed the deficiencies in classifying geometry from two-dimensional (2D) sections. Σ3 Crystal volumes can be categorized as lamellar or edge structures. Lamellar structures are characterized by the appearance of parallel Σ3 boundary planes while an edge structure contains a single Σ3 interface. Sectioning plane location alters the perception of morphology. For simple twin structures, the tradition 2D classifications of morphology (complete parallel, incomplete parallel and corner Σ3) may all appear on a section plane from a single lamellar structure.
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Chini, Maria Rita. "Analyse des hétérogénéités de microstructure et de microtexture héritées par transformation de phase β→α dans des pièces massives en alliage Ti-10V-2Fe-3Al : influence sur la dispersion des propriétés mécaniques." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0149.

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Les alliages de titane β-métastables comme le Ti-10V-2Fe-3Al se substituent progressivement aux alliages α/β dans les applications aéronautiques du fait de leur résistance spécifique améliorée. Leurs microstructures d'emploi sont cependant complexes et multi-échelles, constituées d'une matrice β (de grains millimétriques) partiellement transformée en nodules primaires αp (micrométriques) et en lamelles secondaires αs (sub-micrométriques). Les propriétés finales peuvent être très sensibles aux variations locales de microstructures et sont souvent non maîtrisées lors du forgeage de pièces massives. De plus la matrice β qui représente ~40% du volume et qui a un comportement élastique et plastique fortement anisotrope, comme la phase α, complique la compréhension des mécanismes de déformation en jeu. Le premier objectif de cette thèse est de mettre en œuvre des techniques de caractérisation multi-échelles (la diffraction des neutrons, l'imagerie électronique couplée à l'analyse d'image et l'EBSD, la reconstruction des microtextures de haute température β/αp) pour analyser efficacement la microstructure/texture des constituants β/αp/αs et caractériser leurs hétérogénéités au sein de demi-produits et de pièces obtenues par matriçage. Les résultats permettent d'analyser la fragmentation des grains β en sous-grains, les macrozones αp, le maintien de relation d'orientation entre β/αp et l'organisation des lamelles αs en colonies ou paniers tressés, en pointant les différences de taille de domaines révélés par la cristallographie et l'imagerie standard. Le second objectif est d'appliquer cette méthodologie à l'analyse de facies de rupture d'éprouvettes présentant un comportement singulier (en traction ou en fatigue) pour caractériser les configurations microstructurales à l'origine de l'amorçage de fissures. Cette analyse a principalement été réalisée par polissage manuel du faciès couplé à des acquisitions EBSD mais également en exploitant le potentiel de l'imagerie 3D par MEB-FIB (Focus Ion Beam) et la technique TKD (Transmission Kikuchi Diffraction) sur lame mince prélevée au niveau d'un site d'amorçage par FIB. Enfin, cette étude expérimentale a été complétée par une première approche en simulation micromécanique sur une microstructure modèle 100% β. L'objectif était d'évaluer l'influence de l’anisotropie élastique de la phase β sur la genèse de contraintes d'incompatibilités dans les régimes élastique et élasto-plastique. L'ensemble des résultats contribue à une meilleure compréhension des variations de propriétés mécaniques en lien avec la microstructure locale
The β-metastable titanium alloys such as Ti-10V-2Fe-3Al are gradually replacing α/β alloys in aeronautical applications thanks to their improved specific strength. However, their microstructures are complex and multi-scale, consisting of a β matrix (of millimetric grains) partially transformed into primary αp nodules (micrometric) and secondary αs lamellae (sub-micrometric). The final mechanical properties are very sensitive to local variations of the microstructure, which are not always fully controlled during forging of massive parts. Moreover, the β matrix, which represent 40% of the volume and whose elastic and plastic behavior is strongly anisotropic (like the α phase) complicates the understanding of the mechanisms of deformation. The first objective of this thesis was to efficiently characterize the microstructure/texture of the different constituents (β/αp/αs) and their heterogeneities within half-finished products and forged parts by using techniques of multi-scale characterization (neutron diffraction, electronic imaging coupled with image analysis and EBSD, reconstruction of high temperature microtextures β/αp). As a result the fragmentation of the β grains into subgrains, the αp macrozones, the destruction of the orientation relation between β/αp and the organization of the αs lamellae in colonies or basket weave was quantified and the differences in size of domains revealed by crystallography and by standard imaging were pointed out. The second objective is to apply this methodology to the analysis of fracture surfaces of samples exhibiting singular behavior (in tension or in fatigue) in order to characterize the microstructural configurations leading to early cracking. This analysis was mainly performed by manual polishing coupled with EBSD acquisitions but also by using 3D imaging by SEM-FIB (Focus Ion Beam) and TKD (Transmission Kikuchi Diffraction) technique on a thin foil FIB-extracted from the crack initiation site. Finally, this experimental study was completed by a micromechanical simulation on a 100% β model microstructure. The objective was to evaluate the influence of the elastic anisotropy of the β phase on the genesis of incompatibility stresses in the elastic and elasto-plastic regimes. The overall results contribute to a better understanding of the variations of mechanical properties related to the local microstructure
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Yuan, Hui. "3D morphological and crystallographic analysis of materials with a Focused Ion Beam (FIB)." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0134/document.

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L’objectif principal de ce travail est d’optimise la tomographie par coupe sériée dans un microscope ‘FIB’, en utilisant soit l’imagerie électronique du microscope à balayage (tomographie FIB-MEB), soit la diffraction des électrons rétrodiffusés (tomographie dite EBSD 3D). Dans les 2 cas, des couches successives de l’objet d’étude sont abrasées à l’aide du faisceau ionique, et les images MEB ou EBSD ainsi acquises séquentiellement sont utilisées pour reconstruire le volume du matériau. A cause de différentes sources de perturbation incontrôlées, des dérives sont généralement présentes durant l'acquisition en tomographie FIB-MEB. Nous avons ainsi développé une procédure in situ de correction des dérives afin de garder automatiquement la zone d'intérêt (ROI) dans le champ de vue. Afin de reconstruction le volume exploré, un alignement post-mortem aussi précis que possible est requis. Les méthodes actuelles utilisant la corrélation-croisée, pour robuste que soit cette technique numérique, présente de sévères limitations car il est difficile, sinon parfois impossible de se fier à une référence absolue. Ceci a été démontré par des expériences spécifiques ; nous proposons ainsi 2 méthodes alternatives qui permettent un bon alignement. Concernant la tomographie EBSD 3D, les difficultés techniques liées au pilotage de la sonde ionique pour l'abrasion précise et au repositionnement géométrique correct de l’échantillon entre les positions d'abrasion et d’EBSD conduisent à une limitation importante de la résolution spatiale avec les systèmes commerciaux (environ 50 nm)3. L’EBSD 3D souffre par ailleurs de limites théoriques (grand volume d'interaction électrons-solide et effets d'abrasion. Une nouvelle approche, qui couple l'imagerie MEB de bonne résolution en basse tension, et la cartographie d'orientation cristalline en EBSD avec des tensions élevées de MEB est proposée. Elle a nécessité le développement de scripts informatiques permettant de piloter à la fois les opérations d’abrasion par FIB et l’acquisition des images MEB et des cartes EBSD. L’intérêt et la faisabilité de notre approche est démontrée sur un cas concret (superalliage de nickel). En dernier lieu, s’agissant de cartographie d’orientation cristalline, une méthode alternative à l’EBSD a été testée, qui repose sur l’influence des effets de canalisation (ions ou électrons) sur les contrastes en imagerie d’électrons secondaires. Cette méthode corrèle à des simulations la variation d’intensité de chaque grain dans une série d’images expérimentales obtenues en inclinant et/ou tournant l’échantillon sous le faisceau primaire. Là encore, la méthode est testée sur un cas réel (polycritsal de TiN) et montre, par comparaison avec une cartographie EBSD, une désorientation maximale d'environ 4° pour les angles d’Euler. Les perspectives d’application de cette approche, potentiellement beaucoup plus rapide que l’EBSD, sont évoquées
The aim of current work is to optimize the serial-sectioning based tomography in a dual-beam focused ion beam (FIB) microscope, either by imaging in scanning electron microscopy (so-called FIB-SEM tomography), or by electron backscatter diffraction (so-called 3D-EBSD tomography). In both two cases, successive layers of studying object are eroded with the help of ion beam, and sequentially acquired SEM or EBSD images are utilized to reconstruct material volume. Because of different uncontrolled disruptions, drifts are generally presented during the acquisition of FIB-SEM tomography. We have developed thus a live drift correction procedure to keep automatically the region of interest (ROI) in the field of view. For the reconstruction of investigated volume, a highly precise post-mortem alignment is desired. Current methods using the cross-correlation, expected to be robust as this digital technique, show severe limitations as it is difficult, even impossible sometimes to trust an absolute reference. This has been demonstrated by specially-prepared experiments; we suggest therefore two alternative methods, which allow good-quality alignment and lie respectively on obtaining the surface topography by a stereoscopic approach, independent of the acquisition of FIB-SEM tomography, and realisation of a crossed ‘hole’ thanks to the ion beam. As for 3D-EBSD tomography, technical problems, linked to the driving the ion beam for accurate machining and correct geometrical repositioning of the sample between milling and EBSD position, lead to an important limitation of spatial resolution in commercial softwares (~ 50 nm)3. Moreover, 3D EBSD suffers from theoretical limits (large electron-solid interaction volume for EBSD and FIB milling effects), and seems so fastidious because of very long time to implement. A new approach, coupling SEM imaging of good resolution (a few nanometres for X and Y directions) at low SEM voltage and crystal orientation mapping with EBSD at high SEM voltage, is proposed. This method requested the development of computer scripts, which allow to drive the milling of FIB, the acquisition of SEM images and EBSD maps. The interest and feasibility of our approaches are demonstrated by a concrete case (nickel super-alloy). Finally, as regards crystal orientation mapping, an alternative way to EBSD has been tested; which works on the influence of channelling effects (ions or electrons) on the imaging contrast of secondary electrons. This new method correlates the simulations with the intensity variation of each grain within an experimental image series obtained by tilting and/or rotating the sample under the primary beam. This routine is applied again on a real case (polycrystal TiN), and shows a max misorientation of about 4° for Euler angles, compared to an EBSD map. The application perspectives of this approach, potentially faster than EBSD, are also evoked
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Jensen, Jacob K. "Characterization of a High Strength, Refractory High Entropy Alloy, AlMo0.5NbTa0.5TiZr." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492175560975813.

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Simonelli, Marco. "Microstructure evolution and mechanical properties of selective laser melted Ti-6Al-4V." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/15070.

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Selective laser melting (SLM) has been shown to be an attractive manufacturing route for the production of ??/?? titanium alloys, and in particular Ti-6Al-4V. A thorough understanding of the relationship between the process, microstructure and mechanical properties of the components produced by this technology is however crucial for the establishment of SLM as an alternative manufacturing route. The purpose of the present study is thus to determine the microstructure evolution, crystallographic texture and the mechanical properties of SLM Ti-6Al-4V. The effect of several processing parameters on the density and the microstructure of the SLM samples were initially investigated. It was found that different sets of process parameters can be used to fabricate near fully dense components. It was found that the samples built using the optimised process window consist exclusively of ????? martensitic phase precipitated from prior ?? columnar grains. It was observed that the ?? grain solidification is influenced by the laser scan strategy and that the ?? phase has a strong <001> texture along its grain growth direction. The ????? martensitic laths that originate from the parent ?? grains precipitate according to the Burgers orientation relationship. It was found that ????? laths clusters from the same ?? grain have a specific misorientation that minimise the local shape strain. Texture inheritance across successive deposited layers was also observed and discussed in relation to various variant selection mechanisms. The mechanical properties of as-built and stress relieved SLM Ti-6Al-4V built using the same optimised process parameters were then investigated. It was found that the build orientation affects the tensile properties, and in particular the ductility of the samples. Samples built perpendicularly to the building direction showed higher ductility than those built in the vertical orientation. It was also observed that a stress relief heat treatment was beneficial to the mechanical properties of SLM Ti-6Al-4V. The ductility of the stress relieved samples was indeed higher than those found in the as-built condition. It was found that the predominant fracture mode during tensile testing is inter-granular. In terms of high-cycle fatigue, it was found that SLM Ti-6Al-4V is comparable to HIPed cast Ti-6Al-4V but it has a significantly lower fatigue resistance than that of wrought and annealed alloys. It was observed that porosity and the elongated prior ?? grain boundaries decrease substantially the fatigue life of the components. Cracks propagate either by fatigue striation or ductile tearing mechanisms. Using alternative laser scan strategies it was possible to control the microstructure of the as-built samples. It was observed that the laser scan vector length influences several microstructural features, such as the width of the prior ?? grains and the thickness of the ????? laths. It was found that re-melting the same layer has instead little effect on the microstructure. A novel laser scan strategy characterised by much lower laser power and scan speed than those typically used in SLM enabled finally to fabricate SLM Ti-6Al-4V with a microstructure close to that of conventionally manufactured Ti-6Al-4V. This study investigates for the first time the crystallographic texture evolution in Ti-6Al-4V manufactured by SLM. Further, this research presents for the first time the effect of the characteristic microstructure and crystallographic texture on the mechanical properties and fracture of SLM Ti-6Al-4V. Lastly, for the first time this research shows examples of microstructural control during the SLM fabrication of the same alloy using long laser dwell times.
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Chen, Guodong. "Thermal and Mechanical Behavior of Nano-structured Materials." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1326398846.

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Staraselski, Yauheni. "On the experimental design of the material microstructures." Thesis, 2014. http://hdl.handle.net/10012/8418.

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The design techniques of the components on the macro level are established in the scientific community, however are far behind from the real material performance limits. To obtain those limits, the deeper understanding of the material structure is required. The methods of a new comonents production through standard alloying are the basis of the modern material science manufacturing. The design of the materials with expected required performance limits is the next conceptual step for the materials scientist. As results, to make this step, the problem of a precise material structure analyses on the microstructural level is one os the major importance for the next generation materials design. The complexity of the material structure across the scales(macro-micro) requires a new non deterministic methods for better understanding of the connectivity betwen a materials performance and material microstructure features. This work presents a various new research methodologies and techniques of the material microstructure characterization and numerical design with future applications to the anlyses of the material behavior. The focus of the particular research was to analyse a new cross correlation function of the material structure on the micro length scale and develop a novel framework which allows a better understanding of various important material phenomenas such as failure initiation and recrystallization.
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Book chapters on the topic "3D EBSD"

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Huang, Yuchi, Brandon Laflen, Andrew Deal, Ian Spinelli, Anthony Barbuto, and Timothy Hanlon. "Handling Misalignment and Drift in 3D EBSD Data Sets." In 1stInternational Conference on 3D Materials Science, 165–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118686768.ch25.

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Soe, Brian, Cullen McMahon, David Golay, Md Zakaria Quadir, Michael Ferry, and Lori Bassman. "Subgrain Boundary Identification in 3D EBSD Data through Fast Multiscale Clustering." In 1stInternational Conference on 3D Materials Science, 189–94. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118686768.ch29.

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Loeb, Andrew, Brian Soe, Cullen McMahon, Michael Ferry, and Lori Bassman. "Identification and Characterization of Subgrain Features in 3D EBSD Data." In 2nd International Congress on 3D Materials Science, 9–14. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118990278.ch2.

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Huang, Yuchi, Brandon Laflen, Andrew Deal, Ian Spinelli, Anthony Barbuto, and Timothy Hanlon. "Handling Misalignment and Drift in 3D EBSD Data Sets." In Proceedings of the 1st International Conference on 3D Materials Science, 165–70. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48762-5_25.

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Barton, Nathan R., Joel V. Bernier, Ricardo A. Lebensohn, and Anthony D. Rollett. "Direct 3D Simulation of Plastic Flow from EBSD Data." In Electron Backscatter Diffraction in Materials Science, 155–67. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-88136-2_11.

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Loeb, Andrew, Brian Soe, Cullen McMahon, Michael Ferry, and Lori Bassman. "Identification and Characterization of Subgrain Features in 3D EBSD Data." In Proceedings of the 2nd International Congress on 3D Materials Science, 9–14. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48123-4_2.

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Soe, Brian, Cullen McMahon, David Golay, Md Zakaria Quadir, Michael Ferry, and Lori Bassman. "Subgrain Boundary Identification in 3D EBSD Data through Fast Multiscale Clustering." In Proceedings of the 1st International Conference on 3D Materials Science, 189–94. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48762-5_29.

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Petrov, Roumen, Orlando León García, Nuria Sánchez Mouriño, L. A. I. Kestens, Jin Ho Bae, and Ki Bong Kang. "Microstructure - Texture Related Toughness Anisotropy of API-X80 Pipeline Steel Characterized by Means of 3D-EBSD Technique." In Materials Science Forum, 1429–34. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-443-x.1429.

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Conference papers on the topic "3D EBSD"

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Sørensen, Bjørn Eske, Ralf Hielscher, and David Mainprice. "EBSD AND OPTICAL MICROSCOPE LINKED THROUGH OPTICAL MODELLING OF CRYSTALLOGRAPHICAL DATA FROM EBSD AND 3D VISUALIZATION OF OPTICAL PROPERTIES." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-319633.

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Morimoto, Hideo. "Unit Cell Definition of Polycrystal Sheet Material Based on SEM-EBSD Analyses." In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011257.

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Nakamachi, Eiji. "Multi Scale Finite Element Analyses By Using SEM-EBSD Crystallographic Modeling and Parallel Computing." In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011256.

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Fiducia, Thomas A. M., Kexue Li, Amit H. Munshi, Kurt Barth, Walajabad S. Sampath, Chris Grovenor, and John M. Walls. "Large Area 3D Elemental Mapping of a MgZnO/CdTe Solar Cell with Correlative EBSD Measurements." In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). IEEE, 2018. http://dx.doi.org/10.1109/pvsc.2018.8547876.

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Kwakman, Laurens, Marcus Straw, Gaëlle Coustillier, Marc Sentis, Jens Beyersdorfer, Jan Schischka, Falk Naumann, and Frank Altmann. "Sample Preparation Strategies for Fast and Effective Failure Analysis of 3D Devices." In ISTFA 2013. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.istfa2013p0017.

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Abstract In this paper different sample preparation strategies for fast and efficient failure analysis of 3D devices are reviewed and further explored. It will be shown that a combined workflow using laser ablation and plasma FIB milling provides best flexibility to cover most of the FA use cases. Laser ablation guarantees fast, coarse material removal and the subsequent plasma FIB milling provides fast removal of any damage or imperfections induced by the laser ablation, precise navigation to the region of interest, a high quality surface finish allowing direct SEM imaging and analytics such as EBSD and, if required the preparation of a thin lamella for TEM analysis.
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Yamagiwa, Kenta, Satoshi Kataoka, Satoshi Izumi, and Shinsuke Sakai. "Measurement of Three Dimensional Geometry of Creep Void and Grain Boundary With Combining 3D-EBSD Method and SEM Images." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57641.

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A-parameter, void area ratio and other methods about creep void are used to estimate creep damage resulting from creep voids. However, these methods are based on not three-dimensional but two-dimensional geometry, though creep voids are three-dimensional cavities. By combining the 3D-EBSD method with SEM images, we have observed the three-dimensional shape of creep voids and their geometrical relationship with grain boundaries at first. The method is applied to 1Cr-1Mo-0.25V turbine rotor steel subjected to a creep rupture test (580°C, 180MPa). Also, interrupted creep specimens are prepared to observe the progress of void growth. Forty sections with 0.5 μm interval and 100μm × 100μm area are measured by mechanical polishing in order to reconstruct the three-dimensional shapes. In the results, four types of creep void are observed. One is sphere type whose radius is approximately 1μm. It is observed in the specimen whose creep life fraction is 25%. In the specimens with 50% and 75% creep damage, prolate and oblate spheroid whose radius is approximately 2.5μm are observed. Finally, connected voids are located within ruptured specimen. As the creep damage is progressed, not only void growth but also void nucleation is observed. Especially, on prior austenite grain boundary which is three-dimensionally perpendicular to the stress direction, creep voids are nucleated and grow in a concentrated manner. However, such nucleated small voids do not affect the void volume fraction.
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Schemmann, Lars, Charles Stallybrass, Jens Schröder, Andreas Liessem, and Stefan Zaefferer. "Crack Formation in Charpy Tests of the Heat-Affected Zone of Large-Diameter Linepipe Material." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78498.

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Double submerged arc welding is an efficient process used during the production of longitudinally-welded large-diameter pipes. It is well known that the associated high heat input has a negative influence on the toughness of the heat-affected zone (HAZ). The toughness drop is related to changes in the HAZ microstructure compared to the base metal. The austenite grain size increases significantly and larger carbon-rich martensite/austenite particles (M/A-particles) are formed within a coarse bainitic matrix during the phase transformation compared to the as-rolled base material. The exact relationship between the microstructure, the processing conditions, base metal composition and the weld metal are at the focus of attention of materials development efforts at EUROPIPE and Salzgitter Mannesmann Forschung GmbH (SZMF). In the present study, scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) were used to investigate the HAZ of X70 large-diameter pipe material as well as tested Charpy specimens from the same material. Secondary cracks in the direct vicinity of the primary fracture surface of tested Charpy specimens from the HAZ were analyzed by EBSD and SEM to investigate the damage mechanism in detail. It was found that these cracks originate at M/A-particles and that the dominant crack path depends on the crystallographic orientation of the surrounding matrix. The analysis of several EBSD measurements and a 3D-analysis of the propagation direction of the crack showed that secondary cracks frequently propagate parallel to {100} and rarely along {110}-planes. It is known from literature that these are preferred cleavage planes in ferritic steels. The SEM analysis performed in the HAZ of the investigated steel showed that the volume fraction of elongated M/A-particles is elevated close to the fusion line and decreases within the first few hundred micrometers distance from the fusion line. The EBSD measurements illustrate that the geometrically necessary dislocation density is significantly increased in the neighborhood of M/A-particles. This indicates that the bainitic matrix is work-hardened around the M/A-particles during testing and is therefore more prone to the formation of microcracks than other surrounding regions.
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Lim, Harn Chyi, Karin Rudman, Kapil Krishnan, Robert McDonald, Pedro Peralta, Patricia Dickerson, Darrin Byler, Chris Stanek, and Kenneth J. McClellan. "Microstructural Effects on Thermal Conductivity of Uranium Oxide: A 3D Multi-Physics Simulation." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65343.

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Transport mechanisms, such as mass and heat transfer, are critical to the efficiency and the reliability of nuclear fuels such as uranium oxide. These properties can be significantly affected by the microstructure of the material. This paper looks into the effects of grain boundary (GB) Kapitza resistance on the overall heat conductivity of UO2 using a 3-D finite element model with microstructurally explicit information. The model developed is created with a 3-D reconstruction of the microstructure of depleted uranium samples performed using serial sectioning techniques with Focused Ion Beam (FIB) and Electron Backscattering Diffraction (EBSD). The model treats grain bulks, GBs and triple junctions using elements of different dimensionalities, and it is thus capable of incorporating information of all three entities in one model while keeping a manageable computational cost. Furthermore, the properties of these microstructural entities are characterized by misorientation angles and Coincident Site Lattice (CSL) models, which provide a framework to assign spatially dependent thermal and mass transfer properties based on the location and connectivity of these entities in actual microstructures. Coupling between heat transfer and mass transfer of fission products is also taken into account in the study, to make it a multi-physics model capable of following the evolution of thermal performance as fission products are produced. These simulations can provide input and insight into the fuel pellet behaviors at the initial stage of power generation when burnups are low.
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Qidwai, M. A. Siddiq, A. B. Geltmacher, A. C. Lewis, D. J. Rowenhorst, and G. Spanos. "High-Fidelity Reconstruction and Computational Modeling of Metallic Microstructure." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42007.

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The end-objective of this research is to identify critical microstructural features in metals that precipitate plastic flow, and therefore, cause degradation of mechanical performance at higher scales. The material focus is a titanium alloy-β21s. The three-dimensional (3D) microstructure in the mesoscale range was obtained using serial sectioning, optical microscopy, electron backscatter diffraction (EBSD) and computerized 3D reconstruction techniques. The reconstructed volumes, comprising hundreds of beta-Ti grains, provide information on morphology and crystallography. This data was used as input into 3D finite element models to analyze the spatial evolution of state variables, such as stress, strain and crystallographic slip under simple loading conditions. Single crystal hypoelasticity and the assumption of resolved shear stress causing crystal slip were used to represent microstructural material behavior. Evolution of plastic flow with applied loading was analyzed at grain boundary interfaces where most flow occurred. Rendering of large reconstructions into faithful but lean finite element meshes was identified to be the critical issue in simulating accurate material behavior near grain boundaries, establishing definite structure-property relationships at mesoscale and reducing the computational cost.
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Chen, Hongqiang, Jeffrey W. Kysar, Y. Lawrence Yao, and Youneng Wang. "Experimental Characterization and Simulation of Three Dimensional Plastic Deformation Induced by Microscale Laser Shock Peening." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59661.

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Different experimental techniques and 3D FEM simulations are employed to characterize and analyze the three dimensional plastic deformation and residual strain/stress distribution for single crystal Aluminum under microscale laser shock peening assuming finite geometry. Single pulse shock peening at individual locations was studied. X-ray micro-diffraction techniques based on a synchrotron light source affords micron scale spatial resolution and is used to measure the residual stress spatial distribution along different crystalline directions on the shocked surface. Crystal lattice rotation due to plastic deformation is also measured with electron backscatter diffraction (EBSD). The result is experimentally quantified and compared with the simulation result obtained from FEM analysis. The influence of the finite size effect, crystalline orientation are investigated using single crystal plasticity in FEM analysis. The result of the 3D simulations of a single shock peened indentation are compared with the FEM results for a shocked line under 2D plain strain deformation assumption. The prediction of overall character of the deformation and lattice rotation fields in three dimensions will lay the ground work for practical application of μLSP.
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Reports on the topic "3D EBSD"

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Vuong, Mai Phuong, Helmut Schaeben, and Florian Bachmann. Topological grain boundary reconstruction from 3D EBSD data. Cogeo@oeaw-giscience, September 2011. http://dx.doi.org/10.5242/iamg.2011.0239.

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