Abstract
We present results of a large-scale atomic-level study of dislocation-precipitate interaction. We have considered a 12 〈111〉 edge dislocation gliding in α-iron containing coherent copper precipitates of size from 0.7 to 6 nm over a temperature range from 0 to 450 K. The results demonstrate that some features are qualitatively consistent with earlier theoretical conclusions, e.g. the critical resolved shear stress (CRSS) is proportional to L-1 and ln(D), where L and D are precipitate spacing and diameter. Other features, which are intrinsic to the atomic-level nature of the dislocation-precipitate interaction, include strong dependence of the CRSS on temperature, dislocation climb and precipitate phase transformation.
| Original language | English |
|---|---|
| Pages (from-to) | 1233-1237 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 329-333 |
| Issue number | 1-3 PART B |
| DOIs | |
| State | Published - Aug 1 2004 |
| Event | Proceedings of the 11th Conference on Fusion Research - Kyoto, Japan Duration: Dec 7 2003 → Dec 12 2003 |
Funding
Research sponsored by the Office of Fusion Energy Sciences and Division of Materials Sciences and Engineering, US Department of Energy under Contract DE-AC05-00OR22725 with UT-Battelle, LLC and supported by a grant from Engineering and Physical Sciences Research Council of the United Kingdom. The authors thank Dr C.A. English and Professor G.R. Odette for stimulating discussions.