Journal
ACTA MATERIALIA
Volume 54, Issue 13, Pages 3407-3416Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2006.03.044
Keywords
molecular dynamics; dislocation mobility; iron
Ask authors/readers for more resources
We present atomic-scale simulations of screw dislocation glide in bcc iron. Using two interatomic potentials that, respectively, predict degenerate and non-degenerate core structures, we compute the static 0 K dependence of the screw dislocation Peierls stress on crystal orientation and show strong boundary condition effects related to the generation of non-glide stress components. At finite temperatures we show that, with a non-degenerate core, glide by nucleation/propagation of kink-pairs in a {110} glide plane is obtained at low temperatures. A transition in the twinning region, towards an average {112} glide plane, with the formation of debris loops is observed at higher temperatures. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available