锻压技术

5005铝合金热压缩变形行为

英文标题：Hot compression behavior of aluminum alloy 5005

作者：王小娜张辉

单位：湖南大学

分类号：TG146.2+1

出版年,卷(期):页码：2017,42(2):119-123

摘要：

采用Gleeble-3500热模拟试验机对5005铝合金材料进行热压缩试验，应变速率为0.01～10 s-1，变形温度为300～500 ℃，研究了材料的流动应力，并建立了本构方程。研究结果表明：在本实验中，5005铝合金具有负温度敏感性和正应变速率敏感性。变形初期，流动应力随变形程度的增加而迅速升高，达到峰值后，逐渐趋于平缓，此时流变曲线表现为稳态流变特征；该铝合金的热压缩流动应力可用包含Zener-Hollomon参数的双曲正弦关系来描述，其热变形激活能Q为180.69 kJ·mol-1。

The hot compression deformation of aluminum alloy 5005 was performed with temperature 300-500 ℃ and strain rate 0.01-10 s-1 by Gleeble-3500 thermal simulator, and the flow stress of material was studied as well as the constitutive equation was built. The results show that aluminum alloy 5005 has a negativity temperature sensitivity and a positive strain rate sensitivity under the experimental conditions. The flow stress increases with the increase of deformation and tends to maintain constant after reaching a peak value, at this time the rheological curve shows steady-state rheological characteristics. Therefore, the flow stress of aluminum alloy 5005 can be represented by hyperbolic sine equation with Zener-Hollomon parameter, and the hot deformation activation energy is 180.69 kJ·mol-1.

基金项目：

国家自然科学基金资助项目（51574118）

王小娜（1989-），女，硕士研究生张辉（1963-），男，博士，教授，博士生导师

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