Download or read book The Deformation of Zinc Bicrystals at Elevated Temperatures written by Michael David Halliday and published by . This book was released on 1967 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Nucleation and Development of a Recrystallised Structure written by N. B. W. Thompson and published by . This book was released on 1964 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an attempt to determine the mechanism of recrystallisation in zinc, the modes of deformation, which occur at high temperatures when a bicrystal of zinc is sheared along its grain boundary, are being investigated. Towards this end, apparatus for growing bicrystals has been designed and built. Single crystals of zinc, for use as seed crystals, have been grown. Work is progressing towards a method of casting very pure zinc in a bicrystal mould and for seeding the polycrystalline casting for the growth of bicrystals of closely controlled orientation. Techniques for optical, electron microscopical and X-ray diffraction examination of the structure of the bicrystal are currently being developed. (Author).
Download or read book Zinc Abstracts written by and published by . This book was released on 1969 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Aspects of Deformation in Single Crystals and Bicrystals of Aluminum at Elevated Temperatures written by RICHARD H. BUSH and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was made to evaluate the kinematics of grain boundary shear and to compare the results pertaining to crystallographic deformation with those reported in the literature. Melt-grown single crystals and bicrystals of high purityAl were tested in tension at extension rates of 8.20 x 10 to the -6th power to 10 to the -4th power cm/sec (strain rates of approximately 2.3 to 230%/hr) and at temperatures of 538 to 650 C. The bicrystal samples contained pure, symmetrical tilt or twist boundaries of 10, 32, 40, 88, and 90 degrees. Continuous stress and total extension and intermittent shear displacement data were obtained as a function of time. A yield point phenomenon which is caused by a small amount of pre-test deformation was observed for single crystals and to a reduced extent for bicrystals. Its presence is explained by a model based upon dislocation multiplication and the stress dependent velocity of dislocations. A yield stress for grain boundary shear which is associated with a thermally activated process was also observed. (Author).
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nucleation of Deformation Twins in Zinc Bicrystals written by Chi Kwun Chyung and published by . This book was released on 1965 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Bulletin written by and published by . This book was released on 1979 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstructural Design of Advanced Engineering Materials written by Dmitri A. Molodov and published by John Wiley & Sons. This book was released on 2013-07-17 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: The choice of a material for a certain application is made taking into account its properties. If, for example one would like to produce a table, a hard material is needed to guarantee the stability of the product, but the material should not be too hard so that manufacturing is still as easy as possible - in this simple example wood might be the material of choice. When coming to more advanced applications the required properties are becoming more complex and the manufacturer`s desire is to tailor the properties of the material to fit the needs. To let this dream come true, insights into the microstructure of materials is crucial to finally control the properties of the materials because the microstructure determines its properties. Written by leading scientists in the field of microstructural design of engineering materials, this book focuses on the evolution and behavior of granular microstructures of various advanced materials during plastic deformation and treatment at elevated temperatures. These topics provide essential background and practical information for materials scientists, metallurgists and solid state physicists.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Mechanical Properties and Deformation Behavior of Materials Having Ultra Fine Microstructures written by M. Nastasi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an attempt to meet the demand for new ultra-high strength materials, the processing of novel material configurations with unique microstructure is being explored in systems which are further and further from equilibrium. One such class of emerging materials is the so-called nanophased or nanostructured materials. This class of materials includes metals and alloys, ceramics, and polymers characterized by controlled ultra-fine microstructural features in the form oflayered, fibrous, or phase and grain distribution. While it is clear that these materials are in an early stage of development, there is now a sufficient body of literature to fuel discussion of how the mechanical properties and deformation behavior can be controlled through control of the microstructure. This NATO-Advanced Study Institute was convened in order to assess our current state of knowledge in the field of mechanical properties and deformation behavior in materials with ultra fine microstructure, to identify opportunities and needs for further research, and to identify the potential for technological applications. The Institute was the first international scientific meeting devoted to a discussion on the mechanical properties and deformation behavior of materials having grain sizes down to a few nanometers. Included in these discussions were the topics of superplasticity, tribology, and the supermodulus effect. Lectures were also presented which covered a variety of other themes including synthesis, characterization, thermodynamic stability, and general physical properties.
Download or read book Research and Publications written by University of Birmingham. University Research Committee and published by . This book was released on with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Army Research Task Summary written by United States. Army Research Office and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Applied Chemistry written by and published by . This book was released on 1954 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1954- include separately paged section called: Abstracts, formerly published in British abstracts B I and B II.
Download or read book Microstructure and Texture in Steels written by Arunansu Haldar and published by Springer Science & Business Media. This book was released on 2009-09-03 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructure and Texture in Steels and Other Materials comprises a collection of articles pertaining to experimental and theoretical aspects of the evolution of crystallographic texture and microstructure during processing of steels and some other materials. Among the topics covered is the processing-microstructure-texture-property relationship in various kinds of steels, including the latest grade. Special emphasis has been given to introduce recent advances in the characterization of texture and microstructure, as well as modeling. The papers included are written by well-known experts from academia and industrial R and D, which will provide the reader with state-of-the-art, in-depth knowledge of the subject. With these attributes, Microstructure and Texture in Steels and Other Materials is expected to serve the cause of creating awareness of current developments in microstructural science and materials engineering among academic and R and D personnel working in the field.
Download or read book Magnetically and Capillary Driven Grain Boundary Motion in Zinc Bicrystals written by Christoph Günster and published by Cuvillier Verlag. This book was released on 2013-06-05 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: In der vorliegenden Dissertation wurden neue Erkenntnisse auf dem Gebiet der experimentellen Erforschung der Korngrenzenbewegung vorgestellt. Im Rahmen der Arbeit wurde anhand von in-situ Messungen mittels einer eigens dazu entwickelten Polarisationsmikroskopiesonde mit integriertem Heiztisch die Abhängigkeit der Korngrenzenbeweglichkeit vom Desorientierungs- und Inklinationswinkel der Korngrenze, sowie der Temperatur an speziell gezüchteten Bikristallen aus 99,995% Zink mit symmetrischen und asymmetrischen Kippkorngrenzen und gemischten Korngrenzen im Temperaturbereich zwischen 330°C und 415°C in Hochmagnetfeldern von 10 bis 28 Tesla Stärke als Triebkraft untersucht. Dabei wurde die jeweilige Wanderungsgeschwindigkeit v der Korngrenzen bei verschiedenen Temperaturen und treibenden Kräften gemessen. Aus den so erhaltenen Messdaten wurden die Aktivierungsparameter der Korngrenzenbewegung für die jeweils untersuchte Korngrenze bestimmt.Weiter wurde im Rahmen der Experimente in Hochfeldmagneten gezeigt, dass die Polarisationsmikroskopiesonde zur Bestimmung der Korngrenzenenergie in magnetisch anisotropen Metallen verwendet werden kann. Zu kleinerem Anteil wurden auch Versuche zu krümmungsgetriebener Korngrenzenbewegung durchgeführt. Alle Ergebnisse zeigten eine starke Inklinations- und Desorientierungsabhängigkeit der Korngrenzenbeweglichkeit, wobei für asymmetrische Korngrenzen höhere Aktivierungsparameter ermittelt wurden als für symmetrische. Dies wurde auf Unterschiede zwischen der atomistischen Struktur von asymmetrischen und symmetrischen Korngrenzen zurückgeführt. Weiterhin wurde auch die Auswirkung einer Glühung im Hochmagnetfeld auf Textur- und Mikrostrukturentwicklung von Zinkpolykristallen untersucht, wobei gezeigt wurde, dass das Magnetfeld ein geeignetes Werkzeug zur Beeinflussung der Mikrostruktur in Zink ist.
Download or read book Interface Science and Engineering 87 written by Rishi Raj and published by . This book was released on 1988 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
