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Thermal Deformation Behavior and Processing Maps of As-Homogenized Mg-5.8 Zn-0.5 Zr-1.0 Yb Alloy

  • Aluminum and Magnesium: High Strength Alloys for Automotive and Transportation Applications
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Abstract

Isothermal compression tests at temperatures of 250–400°C and strain rates of 0.001–1 s−1 were performed in a Gleeble-1500 thermal simulator to investigate the hot deformation behavior of as-homogenized Mg-5.8 Zn-0.5 Zr-1.0 Yb alloy. The Arrhenius-type constitutive equation and hot processing maps were established based on these experiments. Two dynamic recrystallized (DRX) domains were identified as (1) 280–350°C and 0.15–1 s−1; (2) 330–400°C and 0.001–0.09 s−1. The DRX mechanisms of the above-mentioned two domains and the instability patterns of the unstable regions were analyzed by optical microscopy and electron backscatter diffraction. The results provide a fundamental insight into the processing design, microstructural evolution, and property control of the newly developed Mg-Zn-Zr-Yb alloy.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51605392).

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Authors and Affiliations

  1. Faculty of Materials and Energy, Southwest University, Chongqing, 400715, People’s Republic of China

    Lu Li, Hao Li, Wei Jiang, Zhiyuan Pan, Yu Wang & Tao Wang

Authors
  1. Lu Li
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  2. Hao Li
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  3. Wei Jiang
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  4. Zhiyuan Pan
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  5. Yu Wang
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  6. Tao Wang
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Correspondence to Lu Li.

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Li, L., Li, H., Jiang, W. et al. Thermal Deformation Behavior and Processing Maps of As-Homogenized Mg-5.8 Zn-0.5 Zr-1.0 Yb Alloy. JOM 71, 2033–2039 (2019). https://doi.org/10.1007/s11837-018-3309-y

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  • DOI: https://doi.org/10.1007/s11837-018-3309-y

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