摘要
采用Instron3369电子万能试验机对5052铝合金板进行热拉伸实验,研究该合金在变形温度为523~723 K,应变速率为0.001~0.100 s^-1条件下的流变应力行为。将实心凸起板锻造成形数值仿真结果与板锻造成形实验结果进行对比。研究结果表明:5052铝合金的流变应力随温度升高而降低,随应变速率增大而增大;可用Zener-Hollomon参数的Arrhenius双曲正弦关系来描述该合金的热流变应力行为,其变形激活能为162.72 kJ/mol;该热拉伸本构方程可以准确描述板锻造成形凸起过程的特征,且在673 K时实心凸起板锻造成形性能最好。
The flow stress behavior of 5052 aluminum alloy during hot tensile deformation was studied by thermal simulation test at the deformation temperature of 523-723 K and the strain rate of 0.001-0.100 s-1 on the Instron3369 universal testing machine. The numerical simulation results of the solid boss caused by plate forging was compared with those of the experiment of sheet forging. The results show that the flow stress of 5052 aluminum alloy decreases with the increase of temperature and increases with the increase of strain rate. The flow stress can be represented by a Zener-Hollomon parameter in the hyperbolic sine equation, with the hot deformation activation energy being 162.72 kJ/mol. The constitutive equation can accurately describe the characteristics of the solid boss caused by plate forging, and the forming property of the solid boss plate forging is the best at 673 K.
作者
林启权
王晓伟
董文正
李彦涛
王志刚
LIN Qiquan;WANG Xiaowei;DONG Wenzheng;LI Yantao;WANG Zhigang(Hunan Key Laboratory ofWelding Robots and Applied Technologies,Xiangtan University,Xiangtan 411105,China;State Key Laboratory of Material Forming and Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China;Department of Mechanical and Systems Engineering,Gifu University,Gifu 501-1193,Japan)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第11期2695-2702,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51575467,51605408)
材料成形与模具技术国家重点实验室开放课题研究基金资助项目(P2018-010)
湖南省自然科学基金资助项目(2019JJ50604)~~
关键词
5052铝合金
高温拉伸
本构关系
板锻造
数值仿真
5052 aluminum alloy
high temperature tensile
constitutive model
plate forging
numerical simulation
