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

被引：1
|
作者：
Jianfei Xu [1 ]
Guoxiong Chen [1 ]
Shihua Fu [1 ]
机构：
[1] School of Civil Engineering and Architecture, Hainan University
来源：
Theoretical & 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;
D O I：
暂无
中图分类号：
TG146.21 [];
学科分类号：
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 onethird 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.
引用
收藏
页码：81 / 84
页数：4
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