The hot deformation behavior of a multi-direction forged (MDFed) T2 copper was investigated by the isothermal compression test at deformation temperatures between 673 and 1173 K and strain rates between 0.001 and 10 s^− 1. The results reveal that the deformation characteristics of the flow stress are sensitive to the hot deformation parameters. The deformation activation energy of the MDFed copper under the test conditions was calculated as 195.601 kJ/mol. The constitutive behavior was described by a two-stage constitutive model, which is based on the stress–dislocation relation and kinetics of dynamic recrystallization (DRX). Based on the dynamic material model, the three-dimensional (3D) processing maps were established to identify the instability regions and optimal hot processing parameters. It is found that DRX occurred in all the stability and instability regions, and the optimal processing conditions are in the temperature range of 923–1023 K and strain rate range of 0.1–1 s^− 1, which indicates a feature of incomplete DRX. Moreover, the grains overgrew at high deformation temperatures and low strain rates, resulting in a poor workability for the MDFed copper.

通过等温压缩试验，研究了多方向锻造（MDFed）T2铜在673至1173 K的变形温度和0.001至10 s ^-1的应变速率下的热变形行为。。结果表明，流动应力的变形特性对热变形参数敏感。计算出MDF铜在测试条件下的形变活化能为195.601 kJ / mol。本构行为由两阶段的本构模型描述，该模型基于应力-位错关系和动态再结晶动力学（DRX）。基于动态材料模型，建立了三维（3D）处理图，以识别不稳定性区域和最佳热加工参数。发现DRX发生在所有稳定和不稳定区域，并且最佳处理条件是在923-1023 K的温度范围和0.1-1 s ^-1的应变率范围内，表示不完整的DRX功能。此外，晶粒在高变形温度和低应变率下会过长，导致中密度纤维化铜的可加工性差。