Title

Simulations of the Effect of Surface Coatings on Plasticity at Small Scales

Abstract

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.

Department(s)

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)

13596462

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Elsevier Limited, All rights reserved.

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