Simulations of the Effect of Surface Coatings on Plasticity at Small Scales
Three-dimensional dislocation dynamics simulations were employed to examine how hard coatings affect plastic deformation in micron- and submicron-sized, single-crystal pillars ("micropillars") of nickel. Cross-slip of dislocations in the coated samples was found to be necessary for the formation of banded structures and subcells. Our simulations thus offer an explanation for both the significant increases in compressive strength and the higher strain-hardening rate as well as formation of banded structures in coated micropillars.
C. Zhou et al., "Simulations of the Effect of Surface Coatings on Plasticity at Small Scales," Scripta Materialia, vol. 63, no. 11, pp. 1096-1099, Elsevier Limited, Nov 2010.
The definitive version is available at http://dx.doi.org/10.1016/j.scriptamat.2010.08.012
Materials Science and Engineering
Keywords and Phrases
Cross-Slip; Plastic Deformation; Small Scales; Banded Structures; Coated Sample; Dislocation Dynamics Simulation; Micro-Pillars; Strain Hardening Rate; Sub-Cells; Submicron-Sized; Surface Coatings; Compressive Strength; Geometry; Hard Coatings; Nickel Coatings
International Standard Serial Number (ISSN)
Article - Journal
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