Numerical study of the surface hardening effect on the deformation-induced roughening in titanium polycrystals

Varvara Romanova, Ruslan Revovich Balokhonov, Olga Zinovieva, Valery Shakhidjanov

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    A three-dimensional numerical analysis is performed of the deformation-induced roughening in polycrystalline specimens with and without surface-hardened layers. Three-dimensional microstructure-based constitutive models are developed, using crystal plasticity, and employed in finite element calculations of uniaxial tension. Grain structure is shown to be responsible for free surface roughening under uniaxial loading. Microscale stresses acting normally to the free surface in the bulk of the material are associated with normal displacements. The surface-hardened layer moves the grain structure away from the free surface, smoothing out the microscale folds formed due to displacements of individual grains, while the mesoscale surface undulations remain clearly visible.

    Original languageEnglish
    Pages (from-to)96-102
    Number of pages7
    JournalComputational Materials Science
    Volume116
    DOIs
    Publication statusPublished - 15 Apr 2016

    Keywords

    • Crystal plasticity
    • Deformation-induced roughening
    • Microstructure-based simulation
    • Surface hardening
    • Titanium alloys

    ASJC Scopus subject areas

    • Computer Science(all)
    • Chemistry(all)
    • Materials Science(all)
    • Mechanics of Materials
    • Physics and Astronomy(all)
    • Computational Mathematics

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