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 175 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 Grain Boundary Migration in Metals written by Gunter Gottstein and published by CRC Press. This book was released on 2009-12-23 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major goal of materials science is to create new engineering materials and optimize their cost and performance. Understanding how adjacent materials behave at their borders is an essential part of this process. Grain boundaries are the longest-known crystal defects, but although they were discovered in the mid-eighteenth century, until quite rece

Download or read book Transient Creep and Associated Grain boundary Phenomena in Polycrystalline Alumina and Beryllia written by R. Chang and published by . This book was released on 1961 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Alloying Upon Grain boundary Creep written by F. N. Rhines and published by . This book was released on 1956 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain-boundary displacement, occurring in bicrystals during creep at elevated temperature (350 degrees c), has been measured as a function of the copper content (0.1 to 3 percent) in a series of aluminum-rich aluminum-copper solid-solution alloys. The minimums in stress and temperature, below which grain-boundary motion does not occur, increase regularly with the copper content as would be expected if recovery is necessary for movement. Otherwise, the effects, if any, of the copper solute upon grain-boundary displacement and its rate are too small for identification by the experimental technique employed. It was shown, additionally, that grain-boundary displacement appears regular and proceeds at a constant rate if observed parallel to the stress axis, whereas the motion is seen to occur in a sequence of surges and the rate to diminish with time if the observations are made perpendicular to the stress axis. This is interpreted as further evidence that grain-boundary shearing occurs within a layer of metal of finite thickness and not by sliding upon a single interface.

Download or read book Technical Note National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1956 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Note written by and published by . This book was released on 1956 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Lateral Control Near the Stall Flight Tests with High wing and Low wing Monoplanes of Various Configurations written by Fred E. Weick and published by . This book was released on 1956 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: These results are intended to provide quantitative flight-test information which may be useful to designers in attempting to provide for adequate low-speed control and which may be correlated with analytical analyses as presented in the third and finai report in this series (Technical Note 3677).

Download or read book Determination of Longitudinal Stability and Control Characteristics from Free flight Model Tests with Results at Transonic Speeds for Three Airplane Configurations written by Clarence L. Gills and published by . This book was released on 1957 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physical Metallurgy written by David E. Laughlin and published by Newnes. This book was released on 2014-07-24 with total page 2963 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fifth edition of the highly regarded family of titles that first published in 1965 is now a three-volume set and over 3,000 pages. All chapters have been revised and expanded, either by the fourth edition authors alone or jointly with new co-authors. Chapters have been added on the physical metallurgy of light alloys, the physical metallurgy of titanium alloys, atom probe field ion microscopy, computational metallurgy, and orientational imaging microscopy. The books incorporate the latest experimental research results and theoretical insights. Several thousand citations to the research and review literature are included. - Exhaustively synthesizes the pertinent, contemporary developments within physical metallurgy so scientists have authoritative information at their fingertips - Replaces existing articles and monographs with a single, complete solution - Enables metallurgists to predict changes and create novel alloys and processes

Download or read book Report written by and published by . This book was released on 1957 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1978 with total page 1008 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 Comparison Between Theoretical and Experimental Stresses in Circular Semimonocoque Cylinders with Rectangular Cutouts written by Harvey G. McComb and published by . This book was released on 1955 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comparisons are made between a theory for calculating stresses about rectangular cutouts in circular cylinders of semimonocoque construction published in NACA TN 3200 and previously published NACA experimental data. The comparisons include stresses in the stringers and shear stresses in the center of the shear panels in the neighborhood of the cutout. The theory takes into account the bending flexibility of the rings in the structure, and this factor is found to be important in the calculation of stresses about cutouts. In general, when the ring flexibility is considered, good agreement is exhibited between the calculated and experimental results.

Download or read book Influences of Interface and Dislocation Behavior on Microstructure Evolution Volume 652 written by Mark Aindow and published by . This book was released on 2001-08-20 with total page 360 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 Diffusion and Defect Data Vol 12 written by Fred H. Wohlbier and published by Trans Tech Publications Ltd. This book was released on 1976-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defect and Diffusion Forum Vol. 12

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 TMS 2015 144th Annual Meeting and Exhibition written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2015-02-26 with total page 1584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The TMS 2015 Annual Meeting Supplemental Proceedings is a collection of papers from the TMS 2015 Annual Meeting & Exhibition, held March 15-19 in Orlando, Florida, USA. The papers in this volume represent 33 symposia from the meeting. This volume, along with the other proceedings volumes published for the meeting, and archival journals, such as Metallurgical and Materials Transactions and Journal of Electronic Materials, represents the available written record of the 73 symposia held at TMS2015. This proceedings volume contains both edited and unedited papers; the unedited papers have not necessarily been reviewed by the symposium organizers and are presented "as is." The opinions and statements expressed within the papers are those of the individual authors only, and no confirmations or endorsements are intended or implied.