A micromechanical analysis of deformation-induced surface roughening in surface-modified polycrystalline materials

Varvara Romanova, Ruslan Revovich Balokhonov, Olga Zinovieva

Research output: Contribution to journal › Article

Abstract

The effect of surface layer modification on the deformation-induced surface roughening in polycrystalline materials is investigated numerically. Three-dimensional constitutive models of as-received and surface-hardened polycrystals are constructed and implemented in finite-difference calculations. The free surface is shown to undergo out-of-plane displacements due to microscale stresses developing in the subsurface layer and acting across the free surface. The surface-hardened layer as thin as half the grain diameter efficiently suppresses grain-scale surface displacements. The thicker is the hardened layer, the smoother is the surface of the material.

Original language	English
Pages (from-to)	359-370
Number of pages	12
Journal	Meccanica
Volume	51
Issue number	2
DOIs	https://doi.org/10.1007/s11012-015-0294-x
Publication status	Published - 1 Feb 2016

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Keywords

Numerical simulation
Plastic strain localization
Surface hardening
Surface roughening

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

Romanova, V., Balokhonov, RR., & Zinovieva, O. (2016). A micromechanical analysis of deformation-induced surface roughening in surface-modified polycrystalline materials. Meccanica, 51(2), 359-370. https://doi.org/10.1007/s11012-015-0294-x

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AB - The effect of surface layer modification on the deformation-induced surface roughening in polycrystalline materials is investigated numerically. Three-dimensional constitutive models of as-received and surface-hardened polycrystals are constructed and implemented in finite-difference calculations. The free surface is shown to undergo out-of-plane displacements due to microscale stresses developing in the subsurface layer and acting across the free surface. The surface-hardened layer as thin as half the grain diameter efficiently suppresses grain-scale surface displacements. The thicker is the hardened layer, the smoother is the surface of the material.

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10.1007/s11012-015-0294-x