This research provides a comprehensive analysis of the texture and temperature dependent deformation behavior of the aluminum alloy AA6082. The study is performed using a combination of experimental deformation tests and computational simulations using a crystal plasticity (CP) framework. The primary objective is to identify the critical influence of temperature on local stress states and dislocation density within the material during tensile tests. From an experimental perspective, the study employs ex-situ deformation tests and subsequent electron backscatter diffraction (EBSD) data in combination with energy dispersive x-ray spectrometer (EDS) analysis at 200 °C and 400 °C. The experimental EBSD data are adopted, preprocessed and converted into a geometry file for the numerical simulations. On the computational front, a dislocation density-based material model is adopted for CP simulations. The physical and fitting parameters of the model are calculated, adopted from the literature, or calibrated by comparing the global simulation results with experimental stress-strain observations under uniaxial tensile load at room temperature, 200 °C and 400 °C. Empirical functions for solid solution strengthening, dislocation density, fitting parameters controlling mean free path and dislocation annihilation have been derived that can be used to quickly interpolate them for any intermediate temperature. These functions combined with other model parameters can now be used for temperature-dependent CP modeling of AA6082. The isothermal grain-scale simulation and ex-situ experimental results confirmed a noteworthy texture transformation at higher temperatures, characterized by a reduction in the primary Cube orientation and its transition into a Copper orientation due to the stretching process. The correlation between the experimental results and the simulations on macro- and micro-scales is reasonable, indicating the accuracy and effectiveness of the CP approach in predicting the temperature dependent deformation behavior and texture evolution in aluminum alloys.

中文翻译：

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AA6082 铝合金随温度变化的变形行为和织构演化：一种集成的实验和晶体塑性模拟方法

本研究对铝合金 AA6082 的织构和温度相关变形行为进行了全面分析。该研究是通过结合实验变形测试和使用晶体塑性（CP）框架的计算模拟来进行的。主要目标是确定拉伸试验期间温度对材料内局部应力状态和位错密度的关键影响。从实验角度来看，该研究采用了异位变形测试和随后的电子背散射衍射（EBSD）数据，并结合200℃和400℃下的能量色散X射线光谱仪（EDS）分析。采用实验EBSD数据，预处理并转换为几何文件进行数值模拟。在计算方面，采用基于位错密度的材料模型进行CP模拟。模型的物理和拟合参数是通过计算、采用文献或通过将全局模拟结果与室温、200℃和400℃单轴拉伸载荷下的实验应力应变观测结果进行比较来校准的。已经导出了固溶强化、位错密度、控制平均自由程和位错湮灭的拟合参数的经验函数，可用于针对任何中间温度快速插值它们。这些函数与其他模型参数相结合现在可用于 AA6082 的温度相关 CP 建模。等温晶粒尺度模拟和异位实验结果证实了在较高温度下发生了值得注意的织构转变，其特征是主立方体取向的减少以及由于拉伸过程而转变为铜取向。实验结果与宏观和微观尺度上的模拟之间的相关性是合理的，表明CP方法在预测铝合金中随温度变化的变形行为和织构演化方面的准确性和有效性。