Abstract
Molecular dynamics simulation was used to investigate reactions of a 1/2 {110} edge dislocation with interstitial dislocation loops of 1/2 and type in a model of iron. Whether loops are strong or weak obstacles depends not only on loop size and type, but also on temperature and dislocation velocity. These parameters determine whether a loop is absorbed on the dislocation or left behind as it glides away. Absorption requires glide of a reaction segment over the loop surface and cross-slip of dipole dislocation arms attached to the ends of the segment: these mechanisms depend on temperature and strain rate, as discussed here.
Details
Original language | English |
---|
Pages (from-to) | 697-700 |
---|
Journal | Scripta Materialia |
---|
Volume | 62 |
---|
Issue number | 9 |
---|
DOIs | |
---|
Publication status | Published - 1 Feb 2010 |
---|