Recurrence analysis of the Portevin-Le Chatelier effect

TL;DR

This study applies recurrence analysis techniques to stress-time data from tensile tests on Al-Mg alloy, revealing how the Portevin-Le Chatelier effect's dynamics change with strain rate, including a unique crossover phenomenon.

Contribution

It introduces the use of Recurrence Quantification Analysis to study the dynamical behavior of the PLC effect across different strain rates.

Findings

RQA detects the crossover in PLC dynamics.

Recurrence analysis characterizes the change in behavior with strain rate.

The study provides new insights into PLC effect dynamics.

Abstract

Tensile tests were carried out by deforming polycrystalline samples of Al-2.5%Mg alloy at room temperature in a wide range of strain rates where the Portevin-Le Chatelier (PLC) effect was observed. The experimental stress-time series data have been analyzed using the recurrence analysis technique based on the Recurrence Plot (RP) and the Recurrence Quantification Analysis (RQA) to study the change in the dynamical behavior of the PLC effect with the imposed strain rate. Our study revealed that the RQA is able to detect the unique crossover phenomenon in the PLC dynamics.