Glassy features of crystal plasticity

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016-08-02
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Language
en
Pages
1-5
Series
PHYSICAL REVIEW B, Volume 94, issue 6
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.
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Lehtinen , A , Costantini , G , Alava , M J , Zapperi , S & Laurson , L 2016 , ' Glassy features of crystal plasticity ' , Physical Review B , vol. 94 , no. 6 , 064101 , pp. 1-5 . https://doi.org/10.1103/PhysRevB.94.064101