Kubin Dislocations in Solids

1. Auflage 2009
ISBN: 978-0-08-093295-8
Verlag: Elsevier Science & Techn.
Format: EPUB
Kopierschutz: 6 - ePub Watermark

E-Book, Englisch, 323 Seiten

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. .
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-

Autoren/Hrsg.

Kubin, Ladislas

Inhaltsverzeichnis

1;Front cover;1
2;Dislocations in Solids;4
3;Copyright page;5
4;Preface;6
5;Contents: Volume 15;8
6;Contents of Volumes 1-14;10
7;Chapter 88. Dislocation-Obstacle Interactions at the Atomic Level;14
7.1;1. Introduction;17
7.2;2. Structure of models used to simulate dislocations at the atomic level;21
7.3;3. Dislocation glide in pure metals and solid solutions;34
7.4;4. Voids and precipitates;48
7.5;5. Obstacles having dislocation character;70
7.6;6. Concluding remarks;96
7.7;Acknowledgements;98
7.8;References;98
8;Chapter 89. Dislocations in Shock Compression and Release;104
8.1;1. Introduction;107
8.2;2. Early models for dislocations in a shock front;110
8.3;3. Polycrystallinity effects;119
8.4;4. Dislocation structures generated in different metals;123
8.5;5. Stability of dislocation structure generated in shocks;126
8.6;6. Detailed characterization of shock-compressed metals;128
8.7;7. Molecular dynamics simulations of dislocations during shock compression;165
8.8;8. Comparison of computational MD and experimental results;176
8.9;9. Simulations of loading at different strain rates;189
8.10;10. Incipient spallation and void growth;191
8.11;11. Conclusions;203
8.12;Acknowledgment;205
8.13;References;205
9;Chapter 90. Mechanical Properties of Nanograined Metallic Polycrystals;212
9.1;1. Introduction;215
9.2;2. Microstructures in as-prepared ng polycrystals;219
9.3;3. Evolution of the microstructure during plastic flow;228
9.4;4. Mechanical behaviour of ng polycrystals;234
9.5;5. Molecular dynamics;249
9.6;6. Dislocation-mediated plasticity of ng polycrystals;250
9.7;7. Conclusion;256
9.8;References;256
10;Chapter 91. Hydrogen Effects on Plasticity;262
10.1;1. Introduction;264
10.2;2. Experimental observations;270
10.3;3. In situ TEM studies of dislocation behavior;282
10.4;4. Thermal activation parameters for dislocation motion;286
10.5;5. Discussion;287
10.6;6. Summary;302
10.7;Acknowledgments;303
10.8;References;303
11;Author Index;308
12;Subject Index;320