Critical Dynamics of Burst Instabilities in the Portevin-Le Chatelier Effect
Materials Science
2009-11-07 v1 Disordered Systems and Neural Networks
Statistical Mechanics
Abstract
We investigate the Portevin-Le Chatelier effect (PLC), by compressing Al-Mg alloys in a very large deformation range, and interpret the results from the viewpoint of phase transitions and critical phenomena. The system undergoes two dynamical phase transitions between intermittent (or "jerky") and "laminar" plastic dynamic phases. Near these two dynamic critical points, the order parameter 1/\tau of the PLC effect exhibits large fluctuations, and "critical slowing down" (i.e., the number of bursts, or plastic instabilities, per unit time slows down considerably).
Keywords
Cite
@article{arxiv.cond-mat/0112010,
title = {Critical Dynamics of Burst Instabilities in the Portevin-Le Chatelier Effect},
author = {Gianfranco D'Anna and Franco Nori},
journal= {arXiv preprint arXiv:cond-mat/0112010},
year = {2009}
}
Comments
the published 4-page version is in the PRL web site