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Modeling on dynamic recrystallization of aluminium alloy 7050 during hot compression based on cellular automaton

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Abstract

The dynamic recrystallization (DRX) process of hot compressed aluminium alloy 7050 was predicted using cellular automaton (CA) combined with topology deformation. The hot deformatation characteristics of aluminium alloy 7050 were investigated by hot uniaxial compression tests in order to obtain the material parameters used in the CA model. The influences of process parameters (strain, strain rate and temperature) on the fraction of DRX and the average recrystallization grain (R-grain) size were investigated and discussed. It is found that larger stain, higher temperature and lower strain rate (less than 0.1 s–1) are beneficial to the increasing fraction of DRX. And the deformation temperature affects the mean R-grain size much more greatly than other parameters. It is also noted that there is a critical strain for the occurrence of DRX which is related to strain rate and temperature. In addition, it is shown that the CA model with topology deformation is able to simulate the microstructural evolution and the flow behavior of aluminium alloy 7050 material under various deformation conditions.

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Authors and Affiliations

  1. College of Material Science and Engineering, Chongqing University, Chongqing, 400044, China

    Jun-chao Li  (李军超), Zhi-yuan Xie  (谢志远), Song-pu Li  (李松蒲) & Yan-yan Zang  (臧艳艳)

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  1. Jun-chao Li  (李军超)
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  2. Zhi-yuan Xie  (谢志远)
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  3. Song-pu Li  (李松蒲)
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  4. Yan-yan Zang  (臧艳艳)
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Corresponding author

Correspondence to Jun-chao Li  (李军超).

Additional information

Foundation item: Project(2012ZX04010-8) supported by National Key Technology R&D Program of China

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Li, Jc., Xie, Zy., Li, Sp. et al. Modeling on dynamic recrystallization of aluminium alloy 7050 during hot compression based on cellular automaton. J. Cent. South Univ. 23, 497–507 (2016). https://doi.org/10.1007/s11771-016-3095-z

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  • DOI: https://doi.org/10.1007/s11771-016-3095-z

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