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

WP Vellinga, Redmer van Tijum, JTM de Hosson*

*Bijbehorende auteur voor dit werk

    OnderzoeksoutputAcademicpeer review

    103 Citaten (Scopus)
    19 Downloads (Pure)


    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.

    Originele taal-2English
    Pagina's (van-tot)4043-4050
    Aantal pagina's8
    TijdschriftActa Materialia
    Nummer van het tijdschrift15
    StatusPublished - sep.-2005

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