Effect of natural aging on Portevin-Le Chatelier effect of AA7075 sheet

被引：0
|
作者：
Dong G.-J. [1 ]
Sun Y.-F. [2 ]
Fan B.-C. [1 ]
Wang G.-K. [1 ]
Zhao C.-C. [2 ]
机构：
[1] Hebei Key Laboratory of Special Delivery Equipment, Yanshan University, Qinhuangdao
[2] Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education of China, Yanshan University, Qinhuangdao
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 03期
基金：
中国国家自然科学基金;
关键词：
7075 aluminum alloy; Portevin-Le Chatelier (PLC) effect; Surface quality; Temporal and spatial evolutions;
D O I：
10.11817/j.ysxb.1004.0609.2021-36500
中图分类号：
学科分类号：
摘要：
Based on the low temperature thermo-mechanical treatment process of high-strength aluminum alloy, the uniaxial tensile test was combined with three-dimensional digital image correlation (3D-DIC) to study the effect of natural aging on the Portevin-Le Chatelier (PLC) effect of AA7075 sheet. The temporal and spatial evolutions of deformation in the full field of specimen surface of type B and type C were observed. Contour scanning and 3D-DIC were used to study the effect of PLC effect on the surface quality of deformed samples. The results show that with the extension of natural aging time, the serrations in the stress-strain curves and PLC bands characteristics generated by PLC effect change from type C to type B until disappear; at the same time, the surface waviness of the deformed sample weakens. For the static behavior of the PLC bands, the PLC bands has a random position and short production cycle, which has a great influence on the surface quality of the specimen. For the dynamic behavior of the PLC bands, the propagation of the PLC bands causes a continuous and uniform thick displacement of the sheet surface, which has little effect on the surface quality. © 2021, Science Press. All right reserved.
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页码：578 / 589
页数：11
相关论文
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