Abstract
Dislocation-obstacle interactions that resist the glide of dislocations in metals, and hence increase the applied stress necessary for plastic deformation, are treated at the atomic scale. The chapter contains a summary of the techniques used for computer simulation and provides a comprehensive review of progress made over the past decade. Results are presented for the glide resistance of the crystal lattice itself, solute atoms, voids and precipitates. Obstacles with dislocation character, i.e. dislocations loops and stacking fault tetrahedra, are also considered and the varied and sometimes complex dislocation-dislocation reactions that occur are rationalised. Interpretation of results that can be obtained in some cases from the elasticity theory of dislocations is emphasised.
| Original language | English |
|---|---|
| Title of host publication | Dislocations in Solids |
| Editors | L. Kubin, J.P. Hirth |
| Pages | 1-90 |
| Number of pages | 90 |
| DOIs | |
| State | Published - 2009 |
Publication series
| Name | Dislocations in Solids |
|---|---|
| Volume | 15 |
| ISSN (Print) | 1572-4859 |
Funding
Much of the work described in this chapter was carried out with support of grants from a variety of sources, including grants GR/N23189/01, GR/R68870/01 and GR/S81162/01 from the UK Engineering and Physical Sciences Research Council; grant F160-CT-2003-508840 (‘PERFECT’) under programme EURATOM FP-6 of the European Commission; and the Division of Materials Sciences and Engineering and the Office of Fusion Energy Sciences, U.S. Department of Energy, under contract with UT-Battelle, LLC. The authors thank Prof. Y. Bréchet, and Drs. G. Martin, Y. Mastukawa, R.E. Stoller and S.J. Zinkle for many fruitful discussions on theoretical modelling and experimental results, and Drs. T. Nogaret and D. Terentyev for their contributions to dislocation-loop simulations.
Keywords
- atomic-scale mechanisms
- computer simulation
- dislocations
- obstacles to dislocation glide
- radiation damage