Promoting Atomic Scale Engineering by Quantifying Experimental Observations of Dislocation Cores PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Promoting Atomic Scale Engineering by Quantifying Experimental Observations of Dislocation Cores PDF full book. Access full book title Promoting Atomic Scale Engineering by Quantifying Experimental Observations of Dislocation Cores by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Intermetallic alloys are excellent materials for bridging the gap between atomic level processes and macroscopic properties, because the mechanical behavior of these alloys can be closely related to their dislocation structures. The research support by this grant, and described here, was undertaken to elucidate the relationship between atomic level dislocation core structures, alloy composition, and macroscopic mechanical behavior in a series of Nix, Fe(1-x)3Ge alloys and to develop the techniques necessary to perform microsample tensile tests of single crystalline intermetallic alloys. The results from this study, which are described below, have resulted in 6 journal articles, 5 conference proceedings, numerous conference presentations and two M.S. Dissertations. The dislocation structure observations provide benchmarks for first-principle electronic structure calculations and the availability of microsample testing allows for mesoscale testing of individual grains in a number of structural alloys. Both have proven to be valuable tools for bridging the length scales that govern the mechanical performance of high temperature structural materials.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Intermetallic alloys are excellent materials for bridging the gap between atomic level processes and macroscopic properties, because the mechanical behavior of these alloys can be closely related to their dislocation structures. The research support by this grant, and described here, was undertaken to elucidate the relationship between atomic level dislocation core structures, alloy composition, and macroscopic mechanical behavior in a series of Nix, Fe(1-x)3Ge alloys and to develop the techniques necessary to perform microsample tensile tests of single crystalline intermetallic alloys. The results from this study, which are described below, have resulted in 6 journal articles, 5 conference proceedings, numerous conference presentations and two M.S. Dissertations. The dislocation structure observations provide benchmarks for first-principle electronic structure calculations and the availability of microsample testing allows for mesoscale testing of individual grains in a number of structural alloys. Both have proven to be valuable tools for bridging the length scales that govern the mechanical performance of high temperature structural materials.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Get Book Here
Book Description
The overarching scientific goal of this study is to use state-of-the-art TEM techniques to experimentally characterize dislocation core structures in metals and alloys at the atomic scale. The past year has involved the culmination of efforts on intermetallic alloys and pure fcc metals and the development of new techniques for the study of bcc metals and alloys. Our work on (Ni, Fe)3 Ge indicated that changes in mechanical behavior associated with Fe additions are related to variations in dislocation core geometry and its effect on dislocation mobility. These findings have both motivated and been found to be in agreement with first principles based calculations of dislocation core structures in these alloys. In a related study, our weak-beam TEM and HREM experimental observations of dislocation core structures in fcc gold and iridium have been shown to be in excellent agreement with theoretical predictions for these metals. More recent efforts have focused on developing the techniques for characterizing dislocation core structures in bcc metals. Direct HREM observations of dislocation cores and the derivation of localized electron structure data from electron energy loss spectra (EELS) measurements are long term goals, and preliminary steps toward these challenging tasks are underway.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 116
Get Book Here
Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author: Franz Roters
Publisher: John Wiley & Sons
ISBN: 3527642099
Category : Technology & Engineering
Languages : en
Pages : 188
Get Book Here
Book Description
Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1146
Get Book Here
Book Description
Author: Yan Wang
Publisher: Woodhead Publishing Limited
ISBN: 0081029411
Category : Materials science
Languages : en
Pages : 604
Get Book Here
Book Description
Uncertainty Quantification in Multiscale Materials Modeling provides a complete overview of uncertainty quantification (UQ) in computational materials science. It provides practical tools and methods along with examples of their application to problems in materials modeling. UQ methods are applied to various multiscale models ranging from the nanoscale to macroscale. This book presents a thorough synthesis of the state-of-the-art in UQ methods for materials modeling, including Bayesian inference, surrogate modeling, random fields, interval analysis, and sensitivity analysis, providing insight into the unique characteristics of models framed at each scale, as well as common issues in modeling across scales.
Author: I. Kovács
Publisher: Elsevier
ISBN: 1483146189
Category : Science
Languages : en
Pages : 359
Get Book Here
Book Description
Dislocations and Plastic Deformation deals with dislocations and plastic deformation, and specifically discusses topics ranging from deformation of single crystals and dislocations in the lattice to the fundamentals of the continuum theory, the properties of point defects in crystals, multiplication of dislocations, and partial dislocations. The effect of lattice defects on the physical properties of metals is also considered. Comprised of nine chapters, this book begins by providing a short and, where possible, precise explanation of dislocation theory. The first six chapters discuss the properties of dislocations and point defects both in crystals and in an elastic continuum. The reader is then introduced to some applications of dislocation theory that show, for instance, the difficulties involved in understanding the hardening of alloys and the work-hardening of pure metals. This book concludes by analyzing the effect of heat treatment on the defect structure in metals. This text will be of interest to students and practitioners in the field of physics.
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1076
Get Book Here
Book Description
Author: Yongbing Xu
Publisher: Springer
ISBN: 9789400768918
Category : Science
Languages : en
Pages : 0
Get Book Here
Book Description
Over two volumes and 1500 pages, the Handbook of Spintronics will cover all aspects of spintronics science and technology, including fundamental physics, materials properties and processing, established and emerging device technology and applications. Comprising 60 chapters from a large international team of leading researchers across academia and industry, the Handbook provides readers with an up-to-date and comprehensive review of this dynamic field of research. The opening chapters focus on the fundamental physical principles of spintronics in metals and semiconductors, including an introduction to spin quantum computing. Materials systems are then considered, with sections on metallic thin films and multilayers, magnetic tunnelling structures, hybrids, magnetic semiconductors and molecular spintronic materials. A separate section reviews the various characterisation methods appropriate to spintronics materials, including STM, spin-polarised photoemission, x-ray diffraction techniques and spin-polarised SEM. The third part of the Handbook contains chapters on the state of the art in device technology and applications, including spin valves, GMR and MTJ devices, MRAM technology, spin transistors and spin logic devices, spin torque devices, spin pumping and spin dynamics and other topics such as spin caloritronics. Each chapter considers the challenges faced by researchers in that area and contains some indications of the direction that future work in the field is likely to take. This reference work will be an essential and long-standing resource for the spintronics community.
Author: Walter Bollmann
Publisher: Springer Science & Business Media
ISBN: 3642491731
Category : Science
Languages : en
Pages : 264
Get Book Here
Book Description
It is nonnal for the preface to explain the motivation behind the writing of the book. Since many good books dealing with the general theory of crystal defects already exist, a new book has to be especially justified, and here its main justification lies in its treatment of crystal line interfaces. About 1961, the work of the author, essentially based on the fundamental work of Professor F. C. Frank, started to branch away from the main flow of thought in this field and eventually led to a general geometrical theory which is presented as a whole for the first time in this book. Although nearly all that is presented has already been published in different journals and symposia, it might be difficult for the reader to follow that literature, as a new terminology and new methods of analysis had to be developed. Special emphasis is given to discussion and many diagrams are included in order that a clear view of the basic concepts be obtained. Intennediate summaries try to bring out the main points of the chapters. Instead of specific exercises, general suggestions for them are given. The part up to chapter 9 is considered more or less as introductory, so that the book can be studied without specific knowledge of crystals and crystal defects. The presentation of that part developed out of lectures given by the author at the Swiss Federal Institute of Technology (ETH) in Zurich.
