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Deformation behavior of an Al–Cu–Mg–Mn–Zr alloy during hot compression

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Abstract

Deformation behavior of an Al–Cu–Mg–Mn–Zr alloy during hot compression was characterized in present work by high-temperature testing and transmission electron microscope (TEM) studies. The true stress–true strain curves exhibited a peak stress at a critical stain. The peak stress decreased with increasing deformation temperature and decreasing strain rate, which can be described by Zener–Hollomon (Z) parameter in hyperbolic sine function with the deformation activation energy 277.8 kJ/mol. The processing map revealed the existence of an optimum hot-working regime between 390 and 420 °C, under strain rates ranging from 0.1 to 1 s−1. The main softening mechanism of the alloy was dynamic recovery at high lnZ value; continuous dynamic recrystallization (DRX) occurred as deformed at low lnZ value. The dynamic precipitation of Al3Zr and Al20Cu2Mn3 dispersoids during hot deformation restrained DRX and increased the hot deformation activation energy of the alloy.

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Acknowledgements

The authors would like to acknowledge the financial support of National Key Fundamental Research Project of China (Grant No. 2005CB623705-04) and Natural Science Foundation of Hunan Province (Grant No. 08JJ3101).

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Authors and Affiliations

  1. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, China

    Yao Li, Zhiyi Liu, Lianghua Lin & Jiangtao Peng

  2. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Yao Li, Zhiyi Liu, Lianghua Lin & Jiangtao Peng

  3. Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang, 422004, China

    Ailin Ning

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  1. Yao Li
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  2. Zhiyi Liu
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  3. Lianghua Lin
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Correspondence to Zhiyi Liu.

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Li, Y., Liu, Z., Lin, L. et al. Deformation behavior of an Al–Cu–Mg–Mn–Zr alloy during hot compression. J Mater Sci 46, 3708–3715 (2011). https://doi.org/10.1007/s10853-010-5143-7

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