Data di Pubblicazione:
2016
Citazione:
Glassy features of crystal plasticity / A. Lehtinen, G. Costantini, M.J. Alava, S. Zapperi, L. Laurson. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 94:6(2016 Aug 02), pp. 064101.1-064101.5. [10.1103/PhysRevB.94.064101]
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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Electronic, Optical and Magnetic Materials; Condensed Matter Physics
Elenco autori:
A. Lehtinen, G. Costantini, M.J. Alava, S. Zapperi, L. Laurson
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