Abstract
The hot compressive tests of 6082 aluminum alloy were conducted on a Gleeble-3500 thermomechanical simulator at temperature ranges of 380-530 °C and strain rate range of 0.01-10 s−1. The constitutive analysis and microstructural evolution of the alloy were investigated. It was indicated that the peak stress increased with increasing strain rate and decreasing temperature. Dynamic recovery and dynamic recrystallization lead to the softening behavior of the alloy. In order to characterize the flow behavior of this alloy, some models were established based on the experimental data including the phenomenological Arrhenius-type model, the physically based Estrin and Mecking (EM) model for work hardening and dynamic recovery, and the EM model, which was combined with the Avrami equation for dynamic recrystallization. An artificial neural network model was also established to predict the flow stress. The results indicate that the Arrhenius-type model is more simple and more efficient than the EM + Avrami model. Moreover, the well-trained ANN model has the best predicting performance.
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The authors would like to acknowledge the financial support of the Science and Technology Major Project of Hunan Province (2016GK1004) and the Science and Technology Key Project of Guangdong Province (2016B090931001).
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Li, K., Pan, Q., Li, R. et al. Constitutive Modeling of the Hot Deformation Behavior in 6082 Aluminum Alloy. J. of Materi Eng and Perform 28, 981–994 (2019). https://doi.org/10.1007/s11665-019-3873-5
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DOI: https://doi.org/10.1007/s11665-019-3873-5