Abstract
The effect of thermomechanical processing on microstructure, texture evolution, and mechanical properties of Al-Mg-Si-Cu alloys with different Zn contents was studied by mechanical properties, microstructure, and texture characterization in the present study. The results show that thermomechanical processing has a significant influence on the evolution of microstructure and texture and on the final mechanical properties, independently of Zn contents. Compared with the T4P-treated (first preaged at 353 K (80 °C) for 12 hours and then naturally aged for 14 days) sheets with high final cold rolling reduction, the T4P-treated sheets with low final cold rolling reduction possess almost identical strength and elongation and higher average r values. Compared with the intermediate annealed sheets with high final cold rolling reduction, the intermediate annealed sheets with low final cold rolling reduction contain a higher number of particles with a smaller size. After solution treatment, in contrast to the sheets with high final cold rolling reduction, the sheets with low final cold rolling reduction possess finer grain structure and tend to form a weaker recrystallization texture. The recrystallization texture may be affected by particle distribution, grain size, and final cold rolling texture. Finally, the visco-plastic self-consistent (VPSC) model was used to predict r values.
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Acknowledgments
This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFB0300801), the National Natural Science Foundation of China (Grant Nos. 51571023 and 51301016), the Zhejiang Provincial Natural Science Foundation of China (Grant No. LQ17E010001), the Beijing Municipal Natural Science Foundation (Grant No. 2172038), the National High Technical Research and Development Program of China (Grant No. 2013AA032403), the Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, and the K.C. Wong Magna Fund through Ningbo University. The authors are also grateful to Adrien Chapuis, Chongqing University, for his help with the crystal plasticity simulations.
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Manuscript submitted January 28, 2017.
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Wang, X.F., Guo, M.X., Chen, Y. et al. Effect of Thermomechanical Processing on Microstructure, Texture Evolution, and Mechanical Properties of Al-Mg-Si-Cu Alloys with Different Zn Contents. Metall Mater Trans A 48, 3540–3558 (2017). https://doi.org/10.1007/s11661-017-4109-7
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DOI: https://doi.org/10.1007/s11661-017-4109-7