铝合金板温成形流变应力模型的建立与应用

Establishment and Application of Flow Stress Models of Aluminum Alloy Sheet Warm Forming

为实现铝合金Al5083-O温成形的数值模拟与合理制定其成形工艺参数,研究了Al5083-O铝合金板在不同温度和应变速率条件下的温成形特性。引入Zener-Hollomon参数的双曲正弦函数来描述Al5083-O铝合金板温成形时的流变应力与变形温度和应变速率之间的关系,建立了预测这种铝合金在温成形条件下应力-应变曲线的数学模型。计算结果与试验数据吻合较好,证实了Al5083-O铝合金板温成形流变应力预测模型的正确性。

In order to realize numerical simulation of warm forming and establish the warm formation process parameters for Al5083-O aluminum alloy, the warm forming behaviors of Al5083-O aluminum alloy were investigated under different temperature range and strain rate. The relationship between the flow stress in warm forming and the deformation temperature or strain rate was described correctly using the hyperbolic sinusoid function of Zener-Hollomon parameter, a mathematical model was established to predict the stress-strain curves of this Al5083-O aluminum alloy during warm deformation. The stress-strain curves obtained by this model are in good agreement with experimental results, which confirm that the established models are accurate.