Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1498713 | Scripta Materialia | 2013 | 4 Pages |
Abstract
We report direct measurements of displacement jump velocities in deforming nano- and microcrystals. These velocities exhibit large scatter and no correlation with plastic strain, crystal size or applied stress. Statistical analysis for the displacement jump velocities shows a cubic power-law decay, with a shoulder at low velocities. Our results indicate that the collective motion of dislocations in the deforming crystals is dominated by statistical fluctuations within the internal stresses, rather than by a mobility law that depends on the externally applied stress.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Robert Maaß, Peter M. Derlet, Julia R. Greer,