Investigation of Portevin-Le Chatelier Band Strain and Elastic Shrinkage in Al-Based Alloys Associated with Mg Contents

被引：55

作者：

Cai, Yulong ^{[1
]}

Yang, Suli ^{[1
]}

Fu, Shihua ^{[1
]}

Zhang, Di ^{[2
]}

Zhang, Qingchuan ^{[1
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Anhui, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2017年 / 33卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Mg content; Al-Mg alloy; Portevin-Le Chatelier effect; Digital image correlation; Elastic shrinkage; DEFORMATION BANDS; PLASTIC INSTABILITIES; SINGLE-CRYSTALS; ALUMINUM-ALLOYS; JERKY FLOW; PARAMETERS; LOCALIZATION; PROPAGATION; SUPERALLOY; CROSSOVER;

D O I：

10.1016/j.jmst.2016.05.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Portevin-Le Chatelier (PLC) effect in Al-2.30wt% Mg, Al-4.57wt% Mg and Al-6.91wt% Mg alloys has been investigated at various applied strain rates at room temperature in this study. Three-dimensional digital image correlation (3D-DIC) technique was applied to obtaining the further insight into the spa-tiotemporal characteristics, in particular the influence of Mg content on deformation behaviors. Mg content has a pronounced effect on serration characteristics, including the serration type and amplitude; Mg content tends to weaken the spatial correlation of the propagative bands. Additionally, the serration amplitude linearly increases with the maximum PLC band strain; high Mg content generates a higher PLC band strain at a given serration amplitude compared with low Mg content. Mg content is found to be effective to enhance the serration amplitude, the maximum PLC band strain and also the amount of elastic shrinkage outside PLC bands. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：580 / 586

页数：7

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