Molecular dynamics simulation of plasticity in VN(001) crystals under nanoindentation with a spherical indenter

Tao Fu, Xianghe Peng, Chen Wan, Zijun Lin, Xiaosheng Chen, Ning Hu, Zhongchang Wang

    Research output: Contribution to journalArticle

    36 Citations (Scopus)

    Abstract

    We perform molecular dynamics simulations of the nanoindentation on VN (001) films with a spherical indenter to elucidate the initial plastic deformation and the formation mechanisms of dislocation loops during nanoindentation. We find that the nucleation and movement of partial dislocations are the main mechanism of the inelastic deformation at the initial plastic stage of nanoindentation, when the “dislocation flower” consisting of several {111} stacking fault planes and the 〈110〉 stair rod dislocation lines are observed. With the increase in indentation depth, the newly nucleated dislocations react with the existing ones, forming four kinds of dislocation loops. Moreover, we also conduct a systematic analysis of the formation process of the dislocation flower and the four kinds of dislocation loops.

    Original languageEnglish
    Pages (from-to)942-949
    Number of pages8
    JournalApplied Surface Science
    Volume392
    DOIs
    Publication statusPublished - 2017 Jan 15

    Keywords

    • Dislocation flower
    • Dislocation loops
    • Molecular dynamics simulation
    • Nanoindentation
    • VN

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films

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