Download or read book In situ TEM Study of Dislocation Interface Interactions written by Nan Li and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this chapter, we highlighted the in situ transmission electron microscope (TEM) observation of the interactions of dislocations with three types of interfaces: (i) twin boundaries in Cu; (ii) metallic interphase boundaries; and (iii) metal/ceramic interfaces. Interface structures, interface properties, and dislocation-interface interactions are characterized in a high-resolution TEM. These knowledge provided insights into the understanding of the physical properties of materials, developing materials modeling tools incorporating interface deformation physics, and designing materials with desired properties.

Download or read book The Transmission Electron Microscope written by Khan Maaz and published by BoD – Books on Demand. This book was released on 2015-09-02 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book The Transmission Electron Microscope abundantly illustrates necessary insight and guidance of this powerful and versatile material characterization technique with complete figures and thorough explanations. The second edition of the book presents deep understanding of new techniques from introduction to advance levels, covering in-situ transmission electron microscopy, electron and focused ion beam microscopy, and biological diagnostic through TEM. The chapters cover all major aspects of transmission electron microscopy and their uses in material characterization with special emphasis on both the theoretical and experimental aspects of modern electron microscopy techniques. It is believed that this book will provide a solid foundation of electron microscopy to the students, scientists, and engineers working in the field of material science and condensed matter physics.

Download or read book Fundamental Aspects of Dislocation Interactions written by G. Kostorz and published by Elsevier. This book was released on 2013-09-03 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures III covers the papers presented at a European Research Conference on Plasticity of Materials-Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures III, held on August 30-September 4, 1992 in Ascona, Switzerland. The book focuses on the processes, technologies, reactions, transformations, and approaches involved in dislocation interactions. The selection first offers information on work softening and Hall-Petch hardening in extruded mechanically alloyed alloys and dynamic origin of dislocation structures in deformed solids. Discussions focus on stress-strain behavior in relation to composition, structure, and annealing; comparison of stress-strain curves with work softening theory; sweeping and trapping mechanism; and model of dipolar wall structure formation. The text then ponders on plastic instabilities and their relation to fracture and dislocation and kink dynamics in f.c.c. metals studied by mechanical spectroscopy. The book takes a look at misfit dislocation generation mechanisms in heterostructures and evolution of dislocation structure on the interfaces associated with diffusionless phase transitions. Discussions focus on dislocation representation of a wall of elastic domains; equation of equilibrium of an elastic domain; transformation of dislocations; and theoretical and experimental background. The selection is a valuable reference for readers interested in dislocation interactions.

Download or read book In Situ TEM Study of Interface Sliding and Migration in an Ultrafine Lamellar Structure written by and published by . This book was released on 2005 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The instability of interfaces in an ultrafine TiAl-([gamma])/Ti3Al-([alpha]2) lamellar structure by straining at room temperature has been investigated using in-situ straining techniques performed in a transmission electron microscope. The purpose of this study is to obtain experimental evidence to support the creep mechanisms based upon the interface sliding in association with a cooperative movement of interfacial dislocations previously proposed to interpret the nearly linear creep behavior observed from ultrafine lamellar TiAl alloys. The results have revealed that both the sliding and migration of lamellar interfaces can take place simultaneously as a result of the cooperative movement of interfacial dislocations.

Download or read book Study of Dislocations in Copper by Weak Beam Stereo and in Situ Straining TEM written by and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional transmission electron microscopy (TEM) has been an invaluable tool for verifjhg and developing dislocation theories since the first direct observations of dislocations were made using a TEM in the 1950s. Several useful techniques and technological advancements have been made since, helping fbrther the advancement of dislocation knowledge. The present paper concerns two studies of dislocations in copper made by coupling several of these techniques, specifically weak beam, in situ straining, and stereo TEM. Stereo-TEM coupled with in situ straining TEM was used for tracking 3D dislocation motion and interactions in low dislocation density copper foils. A mechanism by which dislocations in a pileup bypass a dislocation node is observed and discussed. Weak beam TEM is used in conjunction with stereo-TEM to analyze the dislocation content of a dense dislocation wall (DDW).

Download or read book In Situ Transmission Electron Microscopy Experiments written by Renu Sharma and published by John Wiley & Sons. This book was released on 2023-05-15 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-Situ Transmission Electron Microscopy Experiments Design and execute cutting-edge experiments with transmission electron microscopy using this essential guide In-situ microscopy is a recently-discovered and rapidly-developing approach to transmission electron microscopy (TEM) that allows for the study of atomic and/or molecular changes and processes while they are in progress. Experimental specimens are subjected to stimuli that replicate near real-world conditions and their effects are observed at a previously unprecedented scale. Though in-situ microscopy is becoming an increasingly important approach to TEM, there are no current texts combining an up-to-date overview of this cutting-edge set of techniques with the experience of in-situ TEM professionals. In-Situ Transmission Electron Microscopy Experiments meets this need with a work that synthesizes the collective experience of myriad collaborators. It constitutes a comprehensive guide for planning and performing in-situ TEM measurements, incorporating both fundamental principles and novel techniques. Its combination of technical detail and practical how-to advice makes it an indispensable introduction to this area of research. In-Situ Transmission Electron Microscopy Experiments readers will also find: Coverage of the entire experimental process, from method selection to experiment design to measurement and data analysis Detailed treatment of multimodal and correlative microscopy, data processing and machine learning, and more Discussion of future challenges and opportunities facing this field of research In-Situ Transmission Electron Microscopy Experiments is essential for graduate students, post-doctoral fellows, and early career researchers entering the field of in-situ TEM.

Download or read book Time resolved and Three dimensional Study of Dislocation particle Interactions in Aluminum and Copper Alloys written by Grace Liu and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dislocation-particle interactions in three alloys systems, Al-Cu, Al-Mg-Sc, and Cu-Co have been investigated using in situ straining experiments inside the transmission electron microscope, post mortem analysis, and electron tomographic reconstructions. Specifically, diffraction-contrast electron tomography was developed during the course of this work as a 3D imaging technique for crystalline systems such that the dislocation and defect arrangement could be fully characterized and spatially-resolved. Micrographs imaged using two-beam and kinematical bright-field and weak-beam dark-field conditions were acquired over an angular range then used to reconstruct the tomograms. Supplemental advances to the technique include: Visualization of dislocations in color based on Burgers vector or other relevant characteristics; determination of the specimen coordinate system in the tomogram; and overcoming the g 8́9 b invisibility condition by dual-axes tomography. In the Al-Cu system, which contained Al2Cu plate-shaped particles residing on {001}Al habit planes, in situ straining experiments revealed glide of lattice dislocations in the coherent side of the particle-matrix interface. The confined dislocations escaped the interface by cross-slip after reaching one end of the Al2Cu plate or by shearing the particle, as observed during post mortem analysis. Dislocations bypassed the particles by shear at multiple locations along their length, suggesting that a shearing site becomes more unfavorable with each dislocation passage such that adjacent slip systems must be activated in order to continue shear. When highly deformed, the inter-particle region was shown by electron tomography to be populated with a complex configuration of lattice dislocations pinned at both ends on a particle interface as well as debris created from dislocation-dislocation interactions. In the Cu-Co system, semicoherent Co-rich octahedral particles normally unshearble by lattice dislocations were observed to be sheared by small twins emanating from the Cu matrix. This new deformation behavior was attributed to the high strain rates associated with twinning and a small increase in interfacial energy associated with shearing of Co particles, which has the same stacking as the Cu matrix. Interactions with lattice dislocations, on the other hand, exhibited similar behavior during in situ and post mortem observations as the Al-Mg-Sc system, which contained Al3Sc particles. In the semi-coherent regime, between 40 nm and up to around 200 nm for Al3Sc and 100 nm for Co, an initial elastic interaction from the misfit strain field gave way to a novel bypass mechanism involving the creation of half-loops attached on one side to the particle interface via bowing and cross-slip while locally pinned at on the particle interface. Bypass of such a particle also involved interfacial dislocations, which increased the complexity of the particle-matrix interface and impeded subsequent bypass of the same particle. In all cases, multiple interactions with lattice dislocations resulted in the evolution of defect structures around a particle over time and the interactions examined were more complex than single dislocation-single particle interactions depicted in classical theoretical models.

Download or read book In situ Electron Microscopy written by Gerhard Dehm and published by John Wiley & Sons. This book was released on 2012-05-30 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adopting a didactical approach from fundamentals to actual experiments and applications, this handbook and ready reference covers real-time observations using modern scanning electron microscopy and transmission electron microscopy, while also providing information on the required stages and samples. The text begins with introductory material and the basics, before describing advancements and applications in dynamic transmission electron microscopy and reflection electron microscopy. Subsequently, the techniques needed to determine growth processes, chemical reactions and oxidation, irradiation effects, mechanical, magnetic, and ferroelectric properties as well as cathodoluminiscence and electromigration are discussed.

Download or read book Nanoindentation in Materials Science written by Jiri Nemecek and published by BoD – Books on Demand. This book was released on 2012-10-17 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnologies have already attracted massive interest in multiple fields of science and industry. In the past decades, we have witnessed the progress in micro-level experimental techniques that revolutionize the material science. Designing new materials based on the knowledge of mechanics of their building blocks and microstructure manipulations at nanometer scale have become a reality. Nanoindentation, as a leading micro-level mechanical testing technique, has attracted wide attention in numerous research fields and applications. Nowadays, an extensive variety of testing areas ranging from classical thin coatings in machinery engineering, electronics and composites to far fields of civil engineering, biomechanics, implantology or even agriculture can be covered with this universal testing tool. The book aims to be a walk through achievements in some of the distant fields and to give a brief overview of the current frontiers in nanoindentation. Although it is not possible to cover the whole width of the possible themes in one book, it is believed that the reader will benefit from the topics variety and the book will serve as a useful source of literature references.

Download or read book Dislocations and Deformation Mechanisms in Thin Films and Small Structures Volume 673 written by Oliver Kraft and published by . This book was released on 2001-09-20 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanical properties of small volumes of materials (such as thin films and patterned structures) can be very different from larger volumes, especially in the area of dislocation behavior. This text contains a selection of 31 papers from the April 2001 symposium devoted to new methods of dislocation modeling. Topics include mechanisms of plastic deformation in heteroepitaxial, multilayered, and polycrystalline thin films; as well as in 3D mesostructures such as epitaxial islands, semiconducting devices, and microcrystallites. The organizers of the symposium had the particular aim of stimulating exchange between experimental work, theoretical modeling, and numerical simulations. Annotation copyrighted by Book News Inc., Portland, OR.

Download or read book Defect Interface Interactions Volume 319 written by Eric Peter Kvam and published by . This book was released on 1994-03-10 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.

Download or read book Introduction to Dislocations written by Derek Hull and published by Butterworth-Heinemann. This book was released on 2001-07-02 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Dislocations was first published in 1965 in a series aimed at undergraduate and postgraduate students in metallurgy and materials science and related disciplines. At the time, the subject was maturing and it was expected that 'dislocation concepts' would remain a core discipline for a very long time. As expected, the book has been, and remains, an important undergraduate text all over the world. A wider range of materials has emerged since 1965, most notably in the field of electronics and micro-engineering. The principles of dislocation theory still apply but some of the detail requires further treatment. This fourth edition provides an essential basis for an understanding of many of the physical and mechanical properties of crystalline solids. This new edition has been extensively revised and updated to reflect developments in the understanding of the subject, whilst retaining the clarity and comprehensibility of the previous editions.

Download or read book Spielen Gestalten Theatermachen written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heterostructured Materials written by Xiaolei Wu and published by CRC Press. This book was released on 2021-11-24 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterostructured (HS) materials represent an emerging class of materials that are expected to become a major research field for the communities of materials, mechanics, and physics in the next couple of decades. One of the biggest advantages of HS materials is that they can be produced by large-scale industrial facilities and technologies and therefore can be commercialized without the scaling up and high-cost barriers that are often encountered by other advanced materials. This book collects recent papers on the progress in the field of HS materials, especially their fundamental physics. The papers are arranged in a sequence of chapters that will help new researchers entering the field to have a quick and comprehensive understanding of HS materials, including the fundamentals and recent progress in their processing, characterization, and properties.

Download or read book Radiation Damage in Materials written by Yongqiang Wang and published by MDPI. This book was released on 2020-12-28 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complexity of radiation damage effects in materials that are used in various irradiation environments stems from the fundamental particle–solid interactions and the subsequent damage recovery dynamics after the collision cascades, which involves multiple length and time scales. Adding to this complexity are the transmuted impurities that are unavoidable from accompanying nuclear processes. Helium is one such impurity that plays an important and unique role in controlling the microstructure and properties of materials used in fast fission reactors, plasma-facing and structural materials in fusion devices, spallation neutron target designs, actinides, tritium-containing materials, and nuclear waste. Their ultra-low solubility in virtually all solids forces He atoms to self-precipitate into small bubbles that become nucleation sites for further void growth under radiation-induced vacancy supersaturations, resulting in material swelling and high-temperature He embrittlement, as well as surface blistering under low-energy and high-flux He bombardment. This Special Issue, “Radiation Damage in Materials—Helium Effects”, contains review articles and full-length papers on new irradiation material research activities and novel material ideas using experimental and/or modeling approaches. These studies elucidate the interactions of helium with various extreme environments and tailored nanostructures, as well as their impact on microstructural evolution and material properties.

Download or read book Liquid Cell Electron Microscopy written by Frances M. Ross and published by Cambridge University Press. This book was released on 2017 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2.6.2 Electrodes for Electrochemistry

Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-12 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: