Abstract
Aiming at the forward extrusion forming and its parameter optimization of high-strength and heat-resistant Mg-9Gd-3Nd-1Zn-1Sn-0.5Zr alloy, the isothermal compression stress–strain behavior was investigated. The high-temperature plastic deformation constitutive equation and the microstructure evolution of the alloy were obtained. According to the results of variation of stress–strain with strain rates and processing temperatures, a thermal processing map of the alloy was constructed, to obtain a safe processing area where the material is not prone to be unstable. Based on the results of thermal processing map, the experiments were carried out with the punching speed of 2 mm/s, the temperatures of 400 °C, 425 °C and 450 °C and the extrusion ratio of 12. The results showed that the best comprehensive properties of the alloy were obtained at the extrusion temperature of 425 °C. In addition, our findings were in good agreement with the prediction of the thermal processing map.
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This work is supported by the Research and development project of scientific and technological achievements in provincial universities of Heilongjiang provincial department of education (Grant Number TSTAU-R2018003), open research fund of state key laboratory of metastable materials science and technology of Yanshan University (Grant Number 202002).
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Yan, Z., Yu, Y., Qian, J. et al. Hot deformation behavior and optimization of processing parameters of a high-strength Mg-Gd-Nd-Zn-Sn-Zr alloy. Trans Indian Inst Met 73, 2435–2445 (2020). https://doi.org/10.1007/s12666-020-02045-0
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DOI: https://doi.org/10.1007/s12666-020-02045-0