Glassy features of crystal plasticity

Arttu Lehtinen, Giulio Costantini, Mikko J. Alava, Stefano Zapperi, Lasse Laurson

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)
156 Downloads (Pure)

Abstract

Crystal plasticity occurs by deformation bursts due to the avalanchelike motion of dislocations. Here we perform extensive numerical simulations of a three-dimensional dislocation dynamics model under quasistatic stress-controlled loading. Our results show that avalanches are power-law distributed and display peculiar stress and sample size dependence: The average avalanche size grows exponentially with the applied stress, and the amount of slip increases with the system size. These results suggest that intermittent deformation processes in crystalline materials exhibit an extended critical-like phase in analogy to glassy systems instead of originating from a nonequilibrium phase transition critical point.

Original languageEnglish
Article number064101
Pages (from-to)1-5
JournalPhysical Review B
Volume94
Issue number6
DOIs
Publication statusPublished - 2 Aug 2016
MoE publication typeA1 Journal article-refereed

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