On the evolution of surface roughness during deformation of polycrystalline aluminum alloys

WP Vellinga, Redmer van Tijum, JTM de Hosson*

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    Surface roughening of polycrystalline Al-Mg alloys during tensile deformation is investigated using white light confocal microscopy. Materials are tested that differ only in grain size. A height-height correlation technique is used to analyze the data. The surface obeys self-affine scaling on length scales up to a correlation length which approximately equals the grain size and above which no height correlation is present. The self-affine scaling exponent increases initially with strain and saturates at a value around 0.9. A linear relation is observed between root-mean-square roughness and both strain and grain size. The observed roughness is explained as the result of the combined effect of a self-affine roughening on a subgrain scale and a grain scale roughening caused by orientation differences between neighboring grains. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)4043-4050
    Number of pages8
    JournalActa Materialia
    Volume53
    Issue number15
    DOIs
    Publication statusPublished - Sep-2005

    Keywords

    • aluminum alloys
    • orientation imaging microscopy
    • surface structure
    • tension test
    • mesostructure
    • GRAIN ANISOTROPY
    • LIMIT STRAINS
    • SHEETS
    • TEXTURE
    • METALS

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