Influence of solute cloud and precipitates on spatiotemporal characteristics of Portevin-Le Chatelier effect in A2024 aluminum alloys

被引：0

作者：

Sun Liang ^{[1
]}

Zhang Qing-Chuan ^{[1
]}

Cao Peng-Tao ^{[1
]}

机构：

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

来源：

CHINESE PHYSICS B | 2009年 / 18卷 / 08期

基金：

中国国家自然科学基金;

关键词：

aluminum alloy; Portevin-Le Chatelier effect; dynamic strain aging; solution treatment; precipitate particle; SERRATED FLOW; STRAIN; BANDS; MODEL; DISLOCATION; LOCALIZATION; MECHANISMS;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, solute concentration and precipitate content in A2024 aluminum alloy are adjusted by solution treatment (ST) at different temperatures and tensile experiments on these treated specimens are carried out. It is found that the temperature of solution treatment (ST temperature) has a remarkable influence on the amplitude of the serrated flow and the propagation characteristics of shear bands. These results are due to the effects of solute atoms and precipitates on dynamic strain aging (DSA). When ST temperature is higher than 300 degrees C, solute concentration is relatively high and solute cloud is a key factor of DSA. When ST temperature is lower than 300 degrees C, precipitate content is relatively high and the mechanism of DSA is determined by precipitates.

引用

页码：3500 / 3507

页数：8

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