Abstract
To explore the influence of deformation temperature on the tensile and microstructure of high-strength Al alloy, pre-aged AA7075 sheets were processed by cryorolling and room temperature rolling. Hardness and tensile tests examined the mechanical properties of AA7075. The microstructures of AA7075 under different rolling conditions were analyzed by scanning electron microscopy, optical microscopy, x-ray diffraction, electron backscatter diffraction and transmission electron microscope. The results show that the ultimate tensile strength and hardness of cryorolled AA7075 are 672.6 MPa and 226.6 HV, respectively. When the rolling reduction rate reaches 60%, the cryorolled AA7075 remains great ductility of 5.7%. The cryorolling can effectively result in higher dislocation densities, thus improving the strength of the AA7075 sheets. Meanwhile, the cryorolled AA7075 after pre-aging can avoid the occurrence of shear bands and microcracks to improve the material's ductility.
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The data sets generated and analyzed during the current study are available from the corresponding authors on reasonable request.
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Acknowledgements
The authors appreciate the financial support from the National Natural Science Foundation of China (Grant No. 52105419), High-tech Industry Technology Innovation Leading Plan of Hunan Province (Grant No. 2022GK4032), Natural Science Foundation of Hunan Province, China (Grant No. 2022JJ40596), the Innovation Driven Program of Central South University (Grant No. 2019CX006), and the Research Fund of the Key Laboratory of the High-Performance Complex Manufacturing at Central South University.
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Wang, Y., Gao, H., Xing, J. et al. Effect of Cryorolling After Pre-aging on Tensile Properties and Microstructures of AA7075 Plates. JOM 75, 4832–4844 (2023). https://doi.org/10.1007/s11837-023-06102-z
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DOI: https://doi.org/10.1007/s11837-023-06102-z