Dislocations in Solids 1st Edition by Nabarro, Hirth 0080472540 9780444514837

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ISBN 10: 0080472540 

ISBN 13: 9780444514837

Author: F.R.N. Nabarro, J.P. Hirth

This is the first volume to appear under the joint editorship of J.P. Hirth and F.R.N. Nabarro. While Volume 11 concentrated on the single topic of dislocations and work hardening, the present volume spreads over the whole range of the study of dislocations from the application by Kléman and his colleagues of homotopy theory to classifying the line and point defects of mesomorphic phases to Chaudhri’s account of the experimental observations of dislocations formed around indentations.
Chapter 64, by Cai, Bulatove, Chang, Li and Yip, discusses the influence of the structure of the core of a dislocation on its mobility. The power of modern computation allows this topic to be treated from the first principles of electron theory, and with empirical potentials for more complicated problems. Advances in electron microscopy allow these theoretical predictions to be tested.
In Chapter 65, Xu analyzes the emission of dislocations from the tip of a crack and its influence on the brittle to ductile transition. Again, the treatment is predominantly theoretical, but it is consistently related to the very practical example of alpha iron.
In a dazzling interplay of experiment and abstract mathematics, Kléman, Lavrentovich and Nastishin analyze the line and point structural defects of the many mesomorphic phases which have become known in recent years.
Chapter 67, by Coupeau, Girard and Rabier, is essentially experimental. It shows how the various modern techniques of scanning probe microscopy can be used to study dislocations and their interaction with the free surface.
Chapter 68, by Mitchell and Heuer, considers the complex dislocations that can form in ceramic crystals on the basis of observations by transmission electron microscopy and presents mechanistic models for the motion of the dislocations in various temperature regimes.
While the underlying aim of the study of dislocations in energetic crystals by Armstrong and Elban in Chapter 69 is to understand the role of dislocations in the process of detonation, it has the wider interest of studying dislocations in molecular crystals which are “elastically soft, plastically hard, and brittle”.
Chaudhri in Chapter 70 discusses the role of dislocations in indentation processes, largely on the basis of the elastic analysis by E.H. Yoffe. The special case of nanoindentations is treated only briefly.

Table of contents:

Chapter 64: Dislocation Core Effects on Mobility
1 Introduction
2 FCC metals
3 Diamond-cubic semiconductors
4 BCC metals
5 Concluding remarks
Acknowledgements

Chapter 65: Dislocation Nucleation from Crack Tips And Brittle to Ductile Transitions in Cleavage Fracture
1 Introduction
2 Fundamental concepts of dislocation nucleation from crack tips
3 Coupled tension and shear interlayer potentials
4 Modeling of dislocation nucleation from crack tips
5 Dislocation nucleation modes
6 Analysis of dislocation nucleation from crack tips
7 Estimates of the brittle to ductile transition temperature
8 Summary and discussions
Acknowledgements

Chapter 66: Dislocations and Disclinations in Mesomorphic Phases
1 Introduction
2 Topological classification of defects
3 Defects in nematic phases
4 Defects with isometric properties in smectic phases
5 Dislocations vs disclinations. grain boundaries in smectics
6 Defects with isometric properties in columnar phases
7 Role of defects in weak shear deformations
8 Defects in liquid lamellar phases
9 Defects in cholesteric liquid crystals (N*)
10 Competitive interactions in liquid crystals. spontaneous defects, frustration
Acknowledgments
Appendix: Fluorescent confocal polarizing microscopy

Chapter 67: Scanning Probe Microscopy and Dislocations
1 Introduction
2 Scanning probe microscopy
3 Plasticity
4 Conclusion
Acknowledgements

Chapter 68: Dislocations and Mechanical Properties of Ceramics
1 Introduction
2 The critical resolved shear stress
3 Crystallography of slip
4 Dislocations in particular oxides
5 Work hardening
6 Solution hardening
7 Closing remarks
Acknowledgments

Chapter 69: Dislocations in Energetic Crystals
1 Introduction
2 Crystal dislocation characteristics
3 Crystal morphologies and perfections
4 Mechanical properties
5 Chemical reactivity
6 Molecular modeling
7 Summary
Acknowledgements
Note added in proof

Chapter 70: Dislocations and Indentations
1 Introduction
2 Indentation stress fields
3 Dislocation rosettes
4 Cracking around indentations due to dislocation interactions
5 Dislocations Within the indentation itself
6 Indentation-enhanced cathodoluminescence and photoluminescence
7 Nano indentation and dislocations
8 Concluding remarks
Acknowledgements
Note added in the proof

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Tags: Nabarro, Hirth, Dislocations, Solids