Abstract
A continuously cast Al–Mg–Si–Cu alloy was processed by repetitive continuous extrusion forming (R-Conform) and the corresponding deformation behaviors, microstructural evolution and mechanical properties were investigated systematically by combining uniaxial compression deformation, finite element simulation, microstructural observation and mechanical test. The results showed that the grain size of Al–Mg–Si–Cu alloy bar was gradually refined and became more uniform after R-Conform processing with the increase of pass as a result of continuous dynamic recrystallization. The evolution of microstructure was related to the complex thermomechanical conditions of temperature, shear rate and the distribution of accumulated strain during R-Conform process. Then the improvement of properties was obtained by the refined grains after R-Conform processing. Further, the dense and fine precipitates formed after solution treatment and aging led to optimized mechanical properties with tensile strength approximate 400 MPa and elongation about 17.8%.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (52074114, 51904099), Key Technologies R&D in Strategic Emerging Industries and Transformation in High-tech Achievements Program of Hunan Province (2022GK4048), Graduate Training and Innovation Practice Base of Hunan Province and State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology.
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Zhang, L., Lu, R., Tang, J. et al. Microstructural Evolution and Mechanical Properties of a Continuously Cast Al–Mg–Si–Cu Alloy Processed by Repetitive Continuous Extrusion Forming. Met. Mater. Int. 29, 2028–2039 (2023). https://doi.org/10.1007/s12540-022-01353-y
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DOI: https://doi.org/10.1007/s12540-022-01353-y