3003/4004层合板铝合金热变形行为研究

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

摘要:

利用Gleeble3500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450℃ 以及应变速率分别为0.05s-1、0.5s-1、5s-1、25s-1时的变形条件下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。根据实验结果可以看出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，最后根据实验结果求得了描述应变速率、变形温度以及流变应力三者之间关系的本构方程。

Abstract:

The hot compression test was conducted by a Gleeble3500 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 rate of 0.05s-1, 0.5s-1, 5s-1, 25s-1. The compression curve shows a sharp increases for the effect of work-hardening, then it goes smooth for dynamic recovery and recrystallization happened. According to the experimental results, the peak stress was decreased as the strain rate reduced and the temperature increased. Finally a constitution equation describes the relationship of strain rate() ,deformation temperature (T) and flow stress (σ) was achieved.