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      Nanoindentation of hcp metals: a comparative simulation study of the evolution of dislocation networks.

      1 , , ,
      Nanotechnology
      IOP Publishing

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          Abstract

          Using molecular dynamics simulation, we study the nanoindentation of three hcp metals: Mg, Ti, and Zr. Both the basal and two prismatic surface planes are considered. We focus on the characterization of the plasticity generated in the crystal. The similarities to, and the differences from, the behavior of the more commonly investigated fcc and bcc metals are highlighted. We find that hcp metals show a larger variety than the fcc and bcc metals studied up until now. The prolific emission of prismatic loops can lead to extended plastic zones. The size of the plastic zone is quantified by the ratio f of the plastic zone radius to the radius of the contact area. We find values of between 1.6 (an almost collapsed zone) and >5; in the latter case, complex dislocation networks build up which are extended in the direction of easy glide.

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          Author and article information

          Journal
          Nanotechnology
          Nanotechnology
          IOP Publishing
          1361-6528
          0957-4484
          Jan 29 2016
          : 27
          : 4
          Affiliations
          [1 ] Physics Department and Research Center OPTIMAS, University Kaiserslautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern, Germany.
          Article
          10.1088/0957-4484/27/4/045706
          26655887
          5aa98733-2ec1-4ee1-a3c5-d5de36c1d710
          History

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