Discrete dislocation dynamics simulations of surface induced size effects in plasticity
Han CS, Hartmaier A, Gao H, Huang Y (2006)
Publication Language: English
Publication Type: Journal article
Publication year: 2006
Journal
Book Volume: 415
Pages Range: 225-233
Journal Issue: 1-2
DOI: 10.1016/j.msea.2005.09.075
Abstract
Experiments have shown that the presence of free surfaces may induce harder as well as softer deformation behaviors in a crystalline solid. In order to shed some light on these apparently contradictory findings, two-dimensional discrete dislocation dynamics simulations are performed to investigate the surface induced size effects. The simulations indicate that, depending on the surface density of dislocation sources, a free surface may act either as a dislocation sink or as a net dislocation source, and can accordingly exert opposite effects on dislocation density over a boundary layer thickness of up to 500nm into the bulk. This finding provides a possible explanation for the apparent contradictions in experimental observations. © 2005 Elsevier B.V. All rights reserved.
Additional Organisation(s)
Involved external institutions
Max Planck Institute for Intelligent Systems (MPI-IS) / Max-Planck-Institut für Intelligente Systeme
Germany (DE)
University of Illinois at Urbana-Champaign
United States (USA) (US)
Germany (DE)
University of Illinois at Urbana-Champaign
United States (USA) (US)
How to cite
APA:
Han, C.-S., Hartmaier, A., Gao, H., & Huang, Y. (2006). Discrete dislocation dynamics simulations of surface induced size effects in plasticity. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 415(1-2), 225-233. https://doi.org/10.1016/j.msea.2005.09.075
MLA:
Han, Chung-Souk, et al. "Discrete dislocation dynamics simulations of surface induced size effects in plasticity." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 415.1-2 (2006): 225-233.
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