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Dislocation Dynamics and Plasticity / Edition 1

Dislocation Dynamics and Plasticity / Edition 1

Dislocation Dynamics and Plasticity / Edition 1
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ISBN-10:
3642757766
ISBN-13:
9783642757761
Pub. Date:
12/23/2011
Publisher:
Springer Berlin Heidelberg
ISBN-10:
3642757766
ISBN-13:
9783642757761
Pub. Date:
12/23/2011
Publisher:
Springer Berlin Heidelberg
Dislocation Dynamics and Plasticity / Edition 1

Dislocation Dynamics and Plasticity / Edition 1

Overview

In the 1950s the direct observation of dislocations became possible, stimulat­ ing the interest of many research workers in the dynamics of dislocations. This led to major contributions to the understanding of the plasticity of various crys­ talline materials. During this time the study of metals and alloys of fcc and hcp structures developed remarkably. In particular, the discovery of the so-called in­ ertial effect caused by the electron and phonon frictional forces greatly influenced the quantitative understanding of the strength of these metallic materials. Statis­ tical studies of dislocations moving through random arrays of point obstacles played an important role in the above advances. These topics are described in Chaps. 2-4. Metals and alloys with bcc structure have large Peierls forces compared to those with fcc structure. The reasons for the delay in studying substances with bcc structure were mostly difficulties connected with the purification techniques and with microscopic studies of the dislocation core. In the 1970s, these difficulties were largely overcome by developments in experimental techniques and computer physics. Studies of dislocations in ionic and covalent bonding materials with large Peierls forces provided infonnation about the core structures of dislocations and their electronic interactions with charged particles. These are the main subjects in Chaps. 5-7.

Product Details

ISBN-13: 9783642757761
Publisher: Springer Berlin Heidelberg
Publication date: 12/23/2011
Series: Springer Series in Materials Science , #12
Edition description: Softcover reprint of the original 1st ed. 1991
Pages: 228
Product dimensions: 6.10(w) x 9.25(h) x 0.02(d)

Table of Contents

1. Dislocations and Their Fundamental Properties.- 1.1 Geometry of a Dislocation.- 1.2 Stress Field and Energy of Dislocations.- 1.3 Force on a Dislocation.- 1.4 String Model of a Dislocation.- 1.5 Obstacles to Dislocation Motion.- 2. Motion of Dislocations in Soft Metals.- 2.1 General Characteristics.- 2.2 Intrinsic and Extrinsic Barriers for the Motion of Dislocations.- 2.3 Dislocation Velocity.- 2.4 Frictional Forces due to Conduction Electrons and Phonons.- 2.5 Theoretical Studies of the Frictional Forces.- 3. Dislocation Motion in the Field of a Random Distribution of Point Obstacles: Solution Hardening.- 3.1 Solution Hardening.- 3.2 Comparison of Theories of Solution Hardening with Computer Simulation.- 3.3 Effect of a Random Distribution of Point Obstacles on—c.- 3.4 Appendix: Elastic Interaction Between a Dislocation and a Solute Atom.- 4. Dislocation Dynamics and Strength of Crystalline Materials.- 4.1 The Loss of Strength of Metals and Alloys in the Superconducting State.- 4.2 Loss of Strength in the Normal State of Solid Solutions at Low Temperatures.- 4.3 Theory of Inertial Effects.- 4.4 Quantitative Treatment of the Strength of Metals and Alloys of fcc Structure.- 5. Dislocation Motion Controlled by the Peieris Mechanism.- 5.1 Introduction.- 5.2 Dislocation Glide by the Peieris Mechanism.- 6. Dislocations in bcc Metals and Their Motion.- 6.1 Dislocations in bcc Metals and Their Peierls Potential.- 6.2 Computer Experiments.- 6.3 Plasticity of bcc Metals.- 7. Dislocation Motion in Semiconducting Crystals.- 7.1 Introduction.- 7.2 Structure of Dislocations in Semiconducting Crystals.- 7.3 Mobility of Dislocations in Semiconducting Crystals.- 7.4 Effect of Electronic Excitation on the Dislocation Mobility.- 7.5 Photoplastic Effect in II-VI Compounds.- 8.High-Temperature Deformation of Metals and Alloys.- 8.1 Deformation Mechanism Map.- 8.2 Deformation due to Dislocation Motion.- 8.3 Identification of Deformation Mechanism at High Temperatures.- 9. High-Temperature Deformation Mechanism in Metals and Alloys.- 9.1 High-Temperature Deformation Mechanism in Pure Metals.- 9.2 High-Temperature Deformation Mechanism in Alloys.- 10. High-Temperature Deformation Mechanism in Composite Materials.- 10.1 Types of Composite Materials.- 10.2 High-Temperature Deformation Mechanism in Dispersion-Strengthened Materials.- 10.3 High-Temperature Deformation Mechanism in Fiber- and Lamella-Reinforced Materials.- References.
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