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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Hot deformation behavior of Al-Cu-Li-Mg-Zr alloy containing Zn and Mn
CHEN Yong-lai(陈永来)1, LI Jin-feng(李劲风)2, LÜ Hong-jun(吕宏军)1, LI Shi-chen(李世晨)2,
ZHENG Zi-qiao(郑子樵)2, ZHANG Yu-wei(张宇伟

1. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;
2. School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:The hot deformation behavior of a new Al-Cu-Li-Mg-Zr alloy was studied, and its microstructure and true stress were characterized as function of the deformation temperature and the strain rate using Gleeble-1500 thermal mechanical simulator. The results show that, with the increase of the strain rate from 0.001 s−1 to 10 s−1, the peak value of true stress is elevated at the same deformation temperature, and at the same strain rate the peak value of the true stress decreases with the increase of the deformation temperature from 360 ℃ to 520 ℃. Dynamic recrystallization easily occurs in the new Al-Cu-Li-Mg-Zr alloy under the lower strain rate and the higher deformation temperature, and dynamic recovery can usually be seen in this alloy under the higher strain rate of 10 s−1 and the lower deformation temperature.

 

Key words: Al-Li alloy; hot compression deformation; flow stress

ISSN 1672-7029
CN 43-1423/U

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