Irreversibility transition of colloidal polycrystals under cyclic deformation

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Center for Complexity and Biosystems
  • University of Milano
  • Institute for Scientific Interchange Foundation
  • CNR-ENEA-EURATOM Association

Abstract

Cyclically loaded disordered particle systems, such as granular packings and amorphous media, display a non-equilibrium phase transition towards irreversibility. Here, we investigate numerically the cyclic deformation of a colloidal polycrystal with impurities and reveal a transition to irreversible behavior driven by the displacement of dislocations. At the phase transition we observe enhanced particle diffusion, system size effects and broadly distributed strain bursts. In addition to provide an analogy between the deformation of amorphous and polycrystalline materials, our results allow to reinterpret Zener pinning of grain boundaries as a way to prevent the onset of irreversible crystal ordering.

Details

Original languageEnglish
Article number45550
Pages (from-to)1-8
JournalScientific Reports
Volume7
Publication statusPublished - 30 Mar 2017
MoE publication typeA1 Journal article-refereed

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