Scaling Behavior of the Portevin-Le Chatelier Effect in an Al-2.5%Mg Alloy
arXiv:cond-mat/0408132 · doi:10.1103/PhysRevLett.94.055502
Abstract
The scaling behavior of the Portevin-Le Chatelier (PLC) effect was studied by deforming Al-2.5%Mg alloy for a wide range of strain rates. To reveal the exact scaling nature, the time series data of true stress vs. time, obtained during deformation, were analyzed by two complementary methods: the finite variance scaling method and the diffusion entropy analysis. From these analyses we could establish that in the entire span of strain rates, PLC effect showed Levy walk property.
16 pages, 3 figures