Scaling Behavior of the Portevin-Le Chatelier Effect in an Al-2.5%Mg Alloy

TL;DR

This study investigates the scaling behavior of the Portevin-Le Chatelier effect in an Al-2.5%Mg alloy across various strain rates, revealing it exhibits Levy walk properties through advanced time series analysis.

Contribution

It demonstrates that the PLC effect in this alloy exhibits Levy walk scaling behavior, identified using finite variance scaling and diffusion entropy analysis.

Findings

PLC effect shows Levy walk property across strain rates

Finite variance scaling and diffusion entropy methods confirm scaling behavior

Provides insight into the complex dynamics of the PLC effect

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.