Abstract
Hot-rolling plates of Al–4.5Mg–0.7Mn–0.2Zr–0.2Er alloy were prepared under the reduction of 50%, and tensile property, impact toughness were measured at the temperatures varying from 200–470 °C. The microstructure of the hot-rolling plates was investigated using scanning electron microscopy and transmission electron microscopy. The results showed that the tensile strength and yield strength decreased with the rise of the hot-rolling temperature, the elongation and impact toughness showed the opposite trend, and the best match between strength and toughness was at the rolling temperature of 350 °C. The second phase particles in the alloy had a great influence on the impact toughness and plasticity of the alloy. As the rolling temperature increased, the dynamic recovery and dynamic recrystallization occurred in the alloy. Dispersed Al3(Er, Zr) particles formed in the alloy when Er and Zr were added. The Al3(Er, Zr) particles were able to pin dislocation motion, hinder the growth of subgrains and the migration of grain boundaries, thereby inhibited the dynamic recrystallization of Al–4.5Mg–0.7Mn–0.2Zr–0.2Er alloy and its thermal stability improved.
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Acknowledgements
The study is supported in part by the National Key Research and Development Program of China (2016YFB0300804 and 2016YFB0300801), National Natural Science Foundation of China (51671005), Beijing Natural Science Foundation (2162006), Beijing Municipal Science and Technology Project (Z161100002116004) and Program on Jiangsu Key Laboratory for Clad Materials (BM2014006).
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Li, X. et al. (2018). Microstructure and Mechanical Properties of Hot-Rolled 5E83 Alloy. In: Han, Y. (eds) High Performance Structural Materials. CMC 2017. Springer, Singapore. https://doi.org/10.1007/978-981-13-0104-9_9
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DOI: https://doi.org/10.1007/978-981-13-0104-9_9
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