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2 edition of Local lattice rotations and disclinations in microstructures of distorted crystalline materials found in the catalog.

Local lattice rotations and disclinations in microstructures of distorted crystalline materials

proceedings of the International Workshop on Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials, held at Rauschenbach/Erzgebirge, April 10-14, 2000

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Published by Scitech, Distributed in the Americas by Trans Tech Pub. in Switzerland, Enfield, N.H .
Written in English

    Subjects:
  • Dislocations in crystals -- Congresses.,
  • Crystal lattices -- Congresses.,
  • Crystallography -- Congresses.

  • Edition Notes

    Includes bibliographical references and indexes.

    Statementeditors, P. Klimanek, A.E. Romanov, M. Seefeldt.
    GenreCongresses.
    SeriesDiffusion and defect data., v. 87
    ContributionsKlimanek, Peter., Romanov, A. E., Seefeldt, M., International Workshop on Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials (2000 : Rauschenbach/Erzgebirge, Germany)
    Classifications
    LC ClassificationsQD945 .L58 2002
    The Physical Object
    Paginationviii, 310 p. :
    Number of Pages310
    ID Numbers
    Open LibraryOL3705542M
    ISBN 103908450683
    LC Control Number2003274428
    OCLC/WorldCa50757059

      Grain boundaries play an important role in dictating the mechanical and physical properties of nanocrystalline (NC) materials because of the increased volume fraction of intercrystalline components as the grain size decreases. In general, grain boundaries have a high energy level and there exists a thermodynamic driving force to reduce the overall area of grain boundaries through grain. lattice dynamics in order to have a complete picture of crystalline materials, and indeed of amorphous materials too.1 Understanding lattice dynamics is important for a number of key applications. The propagation of sound waves in crystals are a practical example of the role of lattice dynamics, as also is the interaction of materials with light.

    @article{osti_, title = {Lattice Rotation Patterns and Strain Gradient Effects in Face-Centered-Cubic Single Crystals Under Spherical Indentation}, author = {Gao, Y. F. and Larson, B. C. and Lee, J. H. and Nicola, L. and Tischler, J. Z. and Pharr, G. M.}, abstractNote = {Strain gradient effects are commonly modeled as the origin of the size dependence of material strength, such as the.   Plastic deformation of metallic materials up to large strains is, in many cases, characterised by the activation of different deformation modes and the formation of complicated, locally inhomogeneous substructures, which give rise to both significant lattice strains and rotations. A suitable tool for the investigation of the microstructures is a combination of diffraction techniques as, for.

    The motion of the various atoms in the crystalline solid is much like that of the electrons, with the important exception that the atoms are forced on average to remain in their equilibrium atomic positions, which define the lattice. The lattice is, of course, a three-dimensional system. Lattices and Lattice Problems The Two Fundamental Hard Lattice Problems Let L be a lattice of dimension n. The two most im-portant computational problems are: Shortest Vector Problem (SVP) Find a shortest nonzero vector in L. Closest Vector Problem (CVP) Given a vector t 2 Rn not in L, flnd a vector in L that is closest to t. The Approximate.


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Local lattice rotations and disclinations in microstructures of distorted crystalline materials Download PDF EPUB FB2

Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials. Book Cover. The last few years have witnessed a rapidly growing interest in the explanation and interpretation of the mesoscale microstructures which occur in distorted crystalline objects such as, for instance, conventional plastically deformed.

: Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials: Proceedings of the International Workshop on Local Materials,rauschen (Solid State Phenomena) (): P.

Klimanek, P. Klimanek, A. Romanov, M. Seefeldt: BooksAuthor: P. Klimanek. Proceedings of the International Workshop on local lattice rotations and disclinations in microstructures of distorted crystalline materials International Workshop on local lattice rotations and disclinations in microstructures of distorted crystalline materials: Responsibility: editors, P.

Klimanek, A.E. Romanov, M. Seefeldt. Published in 'Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials', Year:pp: Periodical: Solid State Phenomena Vol. Crystal Disclinations Versus Continuum Theory p Fundamentals of Disclination Theory: Development of Disclination-Dislocation Structures in Deformed Materials p TEM Identification of Disclinations in Plastically Deformed Crystals Plastic Instabilities and Misoriented Crystal Lattice p Home Solid State Phenomena Solid State.

Seefeldt (eds.) Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials, Scitec Publicatio ns Ltd, Switzerland, pp Klemm, V, Klimanek, P, Motylenko, M () TEM identification of disclinations in plastically deformed crystals, in P.

Klimanek, A.E. Romanov, M. Seefeldt (eds.) Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials, Scitec Publications Ltd.

Title Sources; Abstracts der Vorträge / Berg- und Hüttenmännischer Tag: Beitrag zur Aufklärung der Erholung plastisch verformter α-CuZn-Legierungen unter besonderer Berücksichtigung des Verhaltens des elektrischen Widerstandes [1.

Disorientations developing during plastic deformation in dislocation structures are investigated. Based on expected mechanisms for the formation of different types of dislocation boundaries (statistical trapping of dislocations or differently activated slip systems) the formation of the disorientation angles across dislocation boundaries is modeled.

Severe plastic deformation of metals leads to an extremely fine microstructure. This is produced by “fragmentation” of the original crystal structure. The mechanisms for this fragmentation are.

Amazon配送商品ならLocal Lattice Rotations and Disclinations in Microstructures of Distorted Crystalline Materials: Proceedings of the International Workshop on Local Lattice Rotations and Disclinations in Microstructures of Distorted Chrystalline Materials, rauschen (Solid State Phenomena)が通常配送無料。更にAmazonならポイント還元本が多数。Klimanek, P., Romanov, A.

Local lattice rotations and in-grain orientation gradients at κ precipitates in matrix grains with orientations near the 45° rotated cube {0 0 1}〈1 1 0〉 (RC) and the γ-fiber components {1 1 1}〈1 1 2〉 were investigated in a Fe 3 Al alloy warm-rolled to reductions of between 10% and 60%.

Near-RC grains showed larger local lattice rotations at precipitates than γ-fiber grains. It is clear from Figs 20(d) and 44(b) that the centerline of the C ∗ ∗ distorted structural units is not aligned along the interface (i.e., the lattice rotation during distortion is not symmetric about the misorientation axis).

Thus, while the disclination dipole model captures the local change in lattice rotation at the defect site (the junction between C and C ∗ ∗ units) and the.

Many crystalline materials exhibit twinned microstructures, where well-defined orientation relationships define the special symmetry between different, elastically anisotropic twin variants. When such twins are subjected to external loading, additional internal stresses necessarily occur at the twin boundaries in order to maintain compatibility.

@article{osti_, title = {Rotating lattice single crystal architecture on the surface of glass}, author = {Savytskii, D. and Jain, H. and Tamura, N. and Dierolf, V.}, abstractNote = {Defying the requirements of translational periodicity in 3D, rotation of the lattice orientation within an otherwise single crystal provides a new form of solid.

The plastic deformation behaviors of crystalline materials are usually determined by lattice dislocations. Below a certain particle or grain size, focus is placed on the grain-boundary-mediated mechanisms (e.g., grain rotation, grain boundary sliding, and diffusion), which has been observed during recrystallization, grain growth, and plastic deformation.

However, the underlying mechanisms of. Most metal crystals are one of the four major types of unit cells. For now, we will focus on the three cubic unit cells: simple cubic (which we have already seen), body-centered cubic unit cell, and face-centered cubic unit cell—all of which are illustrated in Figure 5.

(Note that there are actually seven different lattice systems, some of which have more than one type of lattice, for a. C18 – P. Müllner and A. Romanov, “Modeling internal twinning in terms of disclinations and Somigliana dislocations”, Int.

Workshop ‘Local Lattice Rotations and Disclinations in Microstructures of Distorted Crystals’, Rauschenbach AprilEds. Klimanek, A. Romanov, B. Seefeld, Solid State Phenomena 87 (),   Cold‐working of metallic materials up to large strains is usually characterised by simultaneous substructure evolution on different length scales and accompanied by the formation of significant lattice rotations.

A promising tool for the description of such microstructure development is the concept of partial disclinations. Transmission electron microscopy (TEM) studies illustrate clearly. This page offers a concise index of common crystal lattice structures. A graphical representation as well as useful information about the lattices can be obtained by clicking on the desired structure below.

This page currently contains links to structures in 98 of the space groups. Residual lattice strain in quartz recorded in thin sections is related to macroscopic forces applied during tectonic events in a metamorphic geological environment.

These rocks originally formed at elevated temperatures and pressures and bringing them to ambient conditions may also cause distortions of the crystal lattice.Common Lattice Types Summary.

A crystal structure consists of atoms arranged in a pattern that repeats periodically in a three-dimensional geometric lattice. Body-centered cubic structure is an arrangement of atoms in which the unit cell consists of eight atoms at the corners of a cube and one atom at the body center of the cube.COMMON LATTICE TYPES DOE-HDBK/ Structure of Metals COMMON LATTICE TYPES All metals used in a reactor have crystalline structures.

Crystalline microstructures are arranged in three-dimensional arrays called lattices. This chapter will discuss the three most common lattice structures and their characteristics.