Numerical study of mesoscale surface roughening in aluminum polycrystals under tension

V. A. Romanova, Ruslan Revovich Balokhonov, S. Schmauder

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A 3D numerical analysis of mesoscale surface roughening in a polycrystalline aluminum alloy under uniaxial tension has been performed. Three-dimensional microstructural models with equiaxial and extended grains inherent in cold rolling have been developed and used in calculations. Crystallographic anisotropy is not described in an explicit form by means of, say, a well-known crystal plasticity model. Instead, the elastic-plastic properties of individual grains are varied within 10% and in so doing the mechanical anisotropy due to the grain shape is accounted for. A combined effect of microstructure and loading and boundary conditions is investigated. Pronounced surface roughness of equiaxial grain structure and of a textured material loaded at the right angle to the rolling direction is observed in comparison with extended grain structure loaded along the rolling direction where the surface relief is fairly smooth. Computational results suggest that grain structure is responsible for the formation of a free surface relief during uniaxial loading. Microscale normal and shear stresses associated with the direction perpendicular to the free surface develop in the bulk of the material and, acting from the inside, give rise to surface ridges and valleys.

Original languageEnglish
Pages (from-to)255-263
Number of pages9
JournalMaterials Science and Engineering A
Volume564
DOIs
Publication statusPublished - 1 Mar 2013
Externally publishedYes

Fingerprint

Polycrystals
polycrystals
Aluminum
Crystal microstructure
aluminum
plastic properties
Anisotropy
Cold rolling
anisotropy
cold rolling
three dimensional models
Plasticity
Shear stress
Numerical analysis
Aluminum alloys
microbalances
aluminum alloys
shear stress
Surface roughness
numerical analysis

Keywords

  • Aluminum alloys
  • Finite difference method
  • Micromechanics
  • Microstructure
  • Surface roughening

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Numerical study of mesoscale surface roughening in aluminum polycrystals under tension. / Romanova, V. A.; Balokhonov, Ruslan Revovich; Schmauder, S.

In: Materials Science and Engineering A, Vol. 564, 01.03.2013, p. 255-263.

Research output: Contribution to journalArticle

Romanova, V. A. ; Balokhonov, Ruslan Revovich ; Schmauder, S. / Numerical study of mesoscale surface roughening in aluminum polycrystals under tension. In: Materials Science and Engineering A. 2013 ; Vol. 564. pp. 255-263.
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