Complexity analysis of the Portevin-Le Chatelier in an Al alloy at different temperatures

被引：8

作者：

Xu, Jianfei ^{[1
]}

Chen, Guoxiong ^{[1
]}

Fu, Shihua ^{[1
]}

机构：

[1] Hainan Univ, Sch Civil Engn & Architecture, Haikou 570228, Hainan, Peoples R China

来源：

THEORETICAL AND APPLIED MECHANICS LETTERS | 2021年 / 11卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Portevin-Le Chatelier effect; Dynamic strain aging; Complexity; Modified multiscale entropy; STRAIN; DEFORMATION; ENTROPY; MECHANISMS; BEHAVIOR;

D O I：

10.1016/j.taml.2021.100233

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The complexity of the Portevin-Le Chatelier (PLC) effect in an Al alloy at different temperatures was analyzed by modified multiscale entropy. The results show that three evolutions of entropy with scale factor, i.e., near zero, monotonically increasing and peak-shape, were observed corresponding to the smooth curves, type-A serrations and type-B/-C serrations, respectively. The scale factor at the peak was one-third of the average serration period. The sample entropy increased initially and then decreased with temperature, which was opposite to the critical strain. It is also suggested that the type-A serrations corresponded to self-organized criticality and the type-B/-C serrations corresponded to chaos through the evolutions of entropy with scale factor. (C) 2021 Published by Elsevier Ltd on behalf of The Chinese Society of Theoretical and Applied Mechanics.

引用

页数：4

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