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Article
Modeling energetics and noise in dislocation patterning
Physical Review B (2006)
  • Robb Thomson, Los Alamos National Laboratory
  • M. Koslowski, Los Alamos National Laboratory
  • Richard Alan Lesar, Los Alamos National Laboratory
Abstract
We explore the underlying physics of dislocation ordering in deforming metals, where we focus on the competing role of energy relaxation and the fluctuations (noise) in the local stress field. We investigate the competition by employing a simple two-dimensional model that exhibits the essential physics, while avoiding extraneous mechanisms that might cloud the issues. We show that noise and energetics are equally important in determining the final state of the system. Quantitative functions for the energetic driving force for ordering and the resistive force owing to the noise are developed that balance one another at the relaxed state. These features follow from the system being scale invariant, with power law dependencies of the macrovariables on the number of relaxing dislocations.
Publication Date
January 13, 2006
Citation Information
Robb Thomson, M. Koslowski and Richard Alan Lesar. "Modeling energetics and noise in dislocation patterning" Physical Review B Vol. 73 Iss. 024104 (2006)
Available at: http://works.bepress.com/richard_lesar/2/