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Optimizing Process Parameters of As-Homogenized Mg-Gd-Y-Zn-Zr Alloy in Isothermal Uniaxial Compression on the Basis of Processing Maps via Prasad Criterion and Murty Criterion

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A Correction to this article was published on 23 October 2023

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Abstract

Isothermal compression experiments of as-homogenized Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy are conducted at temperature range of 673-773 K (400-500 °C) and strain rate range of 0.001-1 s−1 in order to identify the optimized processing parameters. Results show that flow stress decreases with the decreasing strain rate at a given temperature and increases with the decreasing temperature at a specific strain rate. Based on the obtained true stress-strain curves, processing maps based on the Prasad criterion and the Murty criterion are separately constructed. Obviously, distributions of power dissipation and the instability regime in the case of the Prasad criterion are different from the corresponding ones in the case of the Murty criterion during hot deformation. Microstructure observations on deformed samples confirm that kink band and dynamic recrystallization, rather than microcrack and flow localization, occur at 698 K and 0.01 s−1. This issue verifies the accuracy of instability regions determined on the base of the Murty criterion. Consequently, the processing window determined on the base of the Murty criterion is more reliable than that identified on the base of the Prasad criterion. The optimized processing parameters are finally ascertained to be 698-748 K, 0.001-0.01 s−1, and 748-773 K, 0.01-0.1 s−1.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51822509, 51805064, 51701034), the Qingnian project of science and technology research program of Chongqing Education Commission of China (Grant Nos. KJQN201801137, KJQN201901106), the Basic and Advanced Research Project of Chongqing Science and Technology Commission (Grant Nos. cstc2018jcyjAX0035).

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Authors and Affiliations

  1. Southwest Technology and Engineering Research Institute, Chongqing, 400039, China

    Qiang Chen

  2. College of Material Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China

    Li Hu, Mingao Li, Laixin Shi, Tao Zhou & Mingbo Yang

  3. Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing, 400054, China

    Yong Chen

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  1. Qiang Chen
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Correspondence to Li Hu.

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Chen, Q., Hu, L., Li, M. et al. Optimizing Process Parameters of As-Homogenized Mg-Gd-Y-Zn-Zr Alloy in Isothermal Uniaxial Compression on the Basis of Processing Maps via Prasad Criterion and Murty Criterion. J. of Materi Eng and Perform 31, 2257–2266 (2022). https://doi.org/10.1007/s11665-021-06305-y

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