Dislocations in Solids (eBook)

John P. Hirth, Ladislas Kubin (Herausgeber)

eBook Download: EPUB

2009 | 1. Auflage
328 Seiten
Elsevier Science (Verlag)
978-0-08-093295-8 (ISBN)

Infos

Bacon and Osetsky present an atomistic model of dislocation-particle interactions in metal systems, including irradiated materials. This work is important in simulating actual behavior, removing earlier reliance on assumed mechanisms for dislocation motion. New mechanisms for dislocation generation under shock loading are presented by Meyers et al. These models provide a basis for understanding the constitutive behavior of shocked material. Saada and Dirras provide a new perspective on the Hall-Petch relation, with particular emphasis on nanocrystals. Of particular significance, deviations from the traditional stress proportional to the square-root of grain size relation are explained. Robertson et al consider a number of effects of hydrogen on plastic flow and provide a model that provides an explanation of the broad range of properties.

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• Flow stress of metal systems with particle hardening, including radiation effects
• New model for dislocation kinetics under shock loading
• Explanation of effects of nanoscale grain size on strength
• Mechanism of hydrogen embrittlement in metal alloys-

Inhalt

Front cover 1
Dislocations in Solids 4
Copyright page 5
Preface 6
Contents: Volume 15 8
Contents of Volumes 1-14 10
Chapter 88. Dislocation-Obstacle Interactions at the Atomic Level 14
1. Introduction 17
2. Structure of models used to simulate dislocations at the atomic level 21
3. Dislocation glide in pure metals and solid solutions 34
4. Voids and precipitates 48
5. Obstacles having dislocation character 70
6. Concluding remarks 96
Acknowledgements 98
References 98
Chapter 89. Dislocations in Shock Compression and Release 104
1. Introduction 107
2. Early models for dislocations in a shock front 110
3. Polycrystallinity effects 119
4. Dislocation structures generated in different metals 123
5. Stability of dislocation structure generated in shocks 126
6. Detailed characterization of shock-compressed metals 128
7. Molecular dynamics simulations of dislocations during shock compression 165
8. Comparison of computational MD and experimental results 176
9. Simulations of loading at different strain rates 189
10. Incipient spallation and void growth 191
11. Conclusions 203
Acknowledgment 205
References 205
Chapter 90. Mechanical Properties of Nanograined Metallic Polycrystals 212
1. Introduction 215
2. Microstructures in as-prepared ng polycrystals 219
3. Evolution of the microstructure during plastic flow 228
4. Mechanical behaviour of ng polycrystals 234
5. Molecular dynamics 249
6. Dislocation-mediated plasticity of ng polycrystals 250
7. Conclusion 256
References 256
Chapter 91. Hydrogen Effects on Plasticity 262
1. Introduction 264
2. Experimental observations 270
3. In situ TEM studies of dislocation behavior 282
4. Thermal activation parameters for dislocation motion 286
5. Discussion 287
6. Summary 302
Acknowledgments 303
References 303
Author Index 308
Subject Index 320

Produkt-Details

• Erscheint lt. Verlag: 13.10.2009
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Physik / Astronomie ► Festkörperphysik
• Themenwelt: Technik ► Maschinenbau
• ISBN-10: 0-08-093295-9 / 0080932959
• ISBN-13: 978-0-08-093295-8 / 9780080932958