【摘要】 根据2014铝合金在变形温度400～490℃、应变速率0.5～10 s^-1条件下的热压缩试验数据，对流变应力、应变速率和变形温度之间的关系进行拟合，建立2014铝合金Arrhenius型本构方程。将本构方程计算的峰值应力值与试验值进行对比，最大误差为4.32%,表明所建立的本构方程能够较好地反映2014铝合金的热变形行为特征。进一步对压缩试验数据进行回归分析，得到了2014铝合金动态再结晶过程的临界应变模型、再结晶体积分数模型，为2014铝合金热加工工艺制定提供参考。更多还原

【Abstract】 Based on the hot compression experimental data of 2014 aluminum alloy under deformation temperatures of 400-490 ℃ and strain rates of 0.5-10 s^-1, the relationship among flow stress, strain rate and deformation temperature was fitted to establish the Arrhenius-type constitutive equation of 2014 aluminum alloy. The peak stress values calculated by the constitutive equation were compared with the experimental values, and the maximum error between the calculated and experimental values was 4.32%, indicating that the established constitutive equation can well reflect the hot deformation behavior characteristics of 2014 aluminum alloy. Through further regression analysis of the compression experimental data, the critical strain model and volume fraction model of the dynamic recrystallization process of 2014 aluminum alloy were obtained, providing a reasonable theoretical basis for the formulation and improvement of the hot working process of 2014 aluminum alloy.更多还原