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

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• 作者：Jun-chao Li 李军贿/a> ; Zhi-yuan Xie 谢志轿/a> ; Song-pu Li 李松萿/a>…
• 关键词：cellular automaton ; dynamic recrystallization ; aluminium alloy 7050 ; flow stress
• 刊名：Journal of Central South University
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：23
• 期：3
• 页码：497-507
• 全文大小：3,195 KB
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• 作者单位：Jun-chao Li 李军超 (1)
  Zhi-yuan Xie 谢志远 (1)
  Song-pu Li 李松蒲 (1)
  Yan-yan Zang 臧艳艳 (1)
  
  1. College of Material Science and Engineering, Chongqing University, Chongqing, 400044, China
  
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Central South University, co-published with Springer
• ISSN：2227-5223

文摘

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.