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A Phenomenological Constitutive Model for Describing Thermo-Viscoplastic Behavior of Al-Zn-Mg-Cu Alloy Under Hot Working Condition

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Abstract

In order to predict the high-temperature deformation behavior of Al-Zn-Mg-Cu alloy, the hot compression tests were conducted in the strain rate range of (0.001–0.1)s−1 and the forming temperature range of (573–723) K. Based on the experimental results, Johnson-Cook model was found inadequate to describe the high-temperature deformation behavior of Al-Zn-Mg-Cu alloy. Therefore, a new phenomenological constitutive model is proposed, considering the coupled effects of strain, strain rate and forming temperature on the material flow behavior of Al-Zn-Mg-Cu alloy. In the proposed model, the material constants are presented as functions of strain rate. The proposed constitutive model correlates well with the experimental results confirming that the proposed model can give an accurate and precise estimate of flow stress for the Al-Zn-Mg-Cu alloy investigated in this study.

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Acknowledgements

This work was supported by 973 Program (Grant No. 2010CB731702), Program for New Century Excellent Talents in University (No. NCET-10-0838), Sheng-hua Yu-ying Program of Central South University, the Freedom Explore Program of Central South University (201011200125), and the Young Core Instructor from the Education Commission of Hunan Province, China.

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Y. C. Lin, L.-T. Li & Y.-Q. Jiang

  2. State Key Laboratory of High Performance Complex Manufacturing, Changsha, 410083, China

    Y. C. Lin, L.-T. Li & Y.-Q. Jiang

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  1. Y. C. Lin
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  2. L.-T. Li
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  3. Y.-Q. Jiang
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Correspondence to Y. C. Lin.

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Lin, Y.C., Li, LT. & Jiang, YQ. A Phenomenological Constitutive Model for Describing Thermo-Viscoplastic Behavior of Al-Zn-Mg-Cu Alloy Under Hot Working Condition. Exp Mech 52, 993–1002 (2012). https://doi.org/10.1007/s11340-011-9546-4

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  • DOI: https://doi.org/10.1007/s11340-011-9546-4

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