Isothermal Forging Process and Strengthening Mechanism of 6082 Aluminum Alloy through Processing Map

被引：0

作者：

Wang J. ^{[1
]}

Mi Z. ^{[1
]}

Li H. ^{[2
]}

Jiang H. ^{[1
]}

Wang P. ^{[1
]}

机构：

[1] Engineering Research Institute, University of Science and Technology Beijing, Beijing

[2] College of Engineering, Yantai Nanshan University, Yantai

来源：

Xiyou Jinshu/Chinese Journal of Rare Metals | 2019年 / 43卷 / 02期

关键词：

6082 aluminum alloy; Constitutive equation; Dislocation density; Processing map;

D O I：

10.13373/j.cnki.cjrm.XY17100002

中图分类号：

学科分类号：

摘要：

The flow behaviors of 6082 aluminum alloy were investigated using high-temperature isothermal compression test on a Glebble-3500 thermal-mechanical simulator at a deformation temperature of 300~500 ℃ and a strain rate range of 0.01~ 10.00 s-1. The constitutive equation for the plastic deformation of 6082 alloy at elevated temperatures was established by introducing Zener-Hollomon parameters. The correlation coefficient and the relative error ratio of verification test were 0.992% and 3.100%, respectively. The processing maps of 6082 aluminum alloy with various true strains were calculated and analyzed according to the dynamic materials model and the optimum processing domain was located at the temperature range of 400~500 ℃ and the true strain rate range of 0.025~1.000 s-1. Moreover, based on the processing map, the optimum forging parameters of 6082 aluminum alloy were set as the temperature of 450 ℃, the true strain of 0.4 (engineering strain 33%) and the strain rate of 0.200 s-1.In addition, the optical microscopy (OM), tensile tests and transmission electron microscopy (TEM) were conducted to analyze the microstructures and mechanical properties of 6082 aluminum alloy after deformation and the strengthening mechanisms were also discussed. The results showed that the dynamic recovery was the main softening mechanism of 6082 aluminum alloy. Meanwhile the nucleation and growth of aging precipitates was closely related to the dislocation density in the matrix. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：113 / 121

页数：8

共 30 条

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