3003/4004层合板铝合金热变形行为研究（英文）

Hot Deformation Behavior of 3003/4004 Two-layered Aluminum Alloy

利用Gleeble 3500热模拟机对3003/4004层合板铝合金进行了热压缩模拟实验,研究了在变形温度分别为300,350,400和450oC以及应变速率分别为0.05,0.5,5,25 s^(-1)的变形条件下3003/4004层合板铝合金的热变形行为。合金的热压缩曲线显示在开始阶段由于加工硬化效应,应力应变曲线迅速上升;随后由于合金的软化,应力应变曲线进入平稳状态。实验结果表明,合金的峰值应力随着应变速率的升高而升高,随着温度的升高而降低。同时,通过计算分析获得了描述应变速率、变形温度以及流变应力三者之间关系的本构方程。

The hot compression test was conducted by a Gleeble 3500 dynamic hot-simulation testing machine to study the hot deformation behavior of 3003/4004 two-layered aluminum alloy. The test was conducted at various temperatures （300, 350, 400 and 450 ℃） with various strain rates of 0.05, 0.5, 5, 25 s^-1. The compression curve shows a sharp increase due to effect of work-hardening, and then it becomes smooth because of dynamic softening. According to the experimental results, the peak stress decreases as the strain rate decreases or the temperature increases. Finally, a constitution equation that describes the relationship of strain rate （ ε ）, deformation temperature （T） and flow stress （σ） is achieved.