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    Deformation mechanisms of MMCs under indentation

    189110_189110.pdf (444.7Kb)
    Access Status
    Open access
    Authors
    Pramanik, Alokesh
    Zhang, Liangchi
    Arsecularatne, Joseph
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Pramanik, A. and Zhang, L. C. and Arsecularatne, J. A. 2008. Deformation mechanisms of MMCs under indentation. Composites Science and Technology. 68 (6): pp. 1304-1312.
    Source Title
    Composites Science and Technology
    DOI
    10.1016/j.compscitech.2007.12.008
    ISSN
    0266-3538
    Remarks

    NOTICE: this is the author’s version of a work that was accepted for publication in Composites Science and Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composites Science and Technology, Volume 68, Issue 6, May 2008, DOI: 10.1016/j.compscitech.2007.12.008

    URI
    http://hdl.handle.net/20.500.11937/20984
    Collection
    • Curtin Research Publications
    Abstract

    This paper investigates the deformation mechanisms of MMCs subjected to micro-indentation by a spherical indenter using a three-dimensional finite element modeling. It was found that deformation behavior, hardness and work hardening of MMCs were highly dependant on the location of indentation relative to particles, volume percentage of the particle, and the size ratio of indenter to particle. The hardness of an MMC varied in a complex manner depending on the restriction on the matrix flow by reinforced particles and work hardening of the matrix material. Hardness increased with the increase of volume percentage of reinforced particles and decrease of the size ratio of indenter to particle. Matrix flow due to indentation was highly non-uniform which generated an inhomogeneous strain filed in an MMC. These pose a question that the conventional definition of micro-hardness is not very appropriate for characterizing MMCs.

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