Fractal Dislocation Patterning During Plastic Deformation
- 21 September 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 81 (12) , 2470-2473
- https://doi.org/10.1103/physrevlett.81.2470
Abstract
During the later stages of plastic deformation, strain hardening of face-centered cubic metals goes along with the formation of cellular dislocation patterns appearing on various scales. The paper presents an analysis of the fractal geometry of these dislocation structures. A theoretical model is presented according to which dislocation cell formation is associated with a noise-induced structural transition far from equilibrium. The observed fractal dimensions are related to the stochastic process of dislocation glide, and implications for quantitative metallography are discussed.Keywords
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