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High Temperature Deformation Behavior of Al–Zn–Mg-Based New Alloy Using a Dynamic Material Model

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Abstract

High temperature compression tests for newly developed Al–Zn–Mg alloy were carried out to investigate its hot deformation behavior and obtain deformation processing maps. In the compression tests, cylindrical specimens were deformed at high temperatures (300–500 °C) and strain rates of 0.001–1/s. Using the true stress–true strain curves obtained from the compression tests, processing maps were constructed by evaluating the power dissipation efficiency map and flow instability map. The processing map can be divided into three areas according to the microstructures of the deformed specimens: instability area with flow localization, instability area with mixed grains, and stable area with homogeneous grains resulting from continuous dynamic recrystallization (CDRX). The results suggest that the optimal processing conditions for the Al–Zn–Mg alloy are 450 °C and a strain rate of 0.001/s, having a stable area with homogeneous grains resulting from CDRX.

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Acknowledgements

This work was supported by the Industrial Strategic Technology Development Program (10062304) funded by the Ministry of Trade, Industry and Energy.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Inha University, Incheon, 22212, Republic of Korea

    Bong Jung Jang, Hyun Soon Park & Mok-Soon Kim

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  1. Bong Jung Jang
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  2. Hyun Soon Park
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  3. Mok-Soon Kim
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Correspondence to Mok-Soon Kim.

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Jang, B.J., Park, H.S. & Kim, MS. High Temperature Deformation Behavior of Al–Zn–Mg-Based New Alloy Using a Dynamic Material Model. Met. Mater. Int. 24, 1249–1255 (2018). https://doi.org/10.1007/s12540-018-0128-1

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  • DOI: https://doi.org/10.1007/s12540-018-0128-1

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