Abstract
The static recrystallization (SRX) behavior of upsetting-extrusion (UE) deformed Mg-13.14Gd-3.86Y-2.0Zn-0.39Zr alloy after different annealing treatments was investigated. The results shown that the SRX occurs after annealing treatment. The degree of SRX increased with increasing annealing temperature. Inside the deformed grains, the main formation mechanism of the recrystallized grains was due to the gradual transformation of a large number of low-angle grain boundaries (LAGBs) into high-angle grain boundaries (HAGBs) with the annealing treatment, thereby forming new grains. At the same time, the dislocation density of the alloy was also reduced. The average grain size decreased because the coarse deformed grains were gradually eroded by new recrystallized grains. No phase transformation occurred in the alloy after annealing treatment. The finely dispersed Mg5(Gd,Y) phase transformed from being abundantly distributed at the grain boundaries of the dynamic recrystallization (DRX) grains to precipitate gradually at the recrystallized grain boundary and inside the grains. The annealing treatment consumed the lamellar and block-shaped long-period stacking ordered (LPSO) phases as strengthening phases, and the newly generated recrystallized grains had random orientations, so the basal texture strength of the alloy decreased.
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Acknowledgements
This research was financially supported by the Joint Funds of the National Natural Science Foundation of China (Grant No. U20A20230) , the Natural Science Foundation of Shanxi Province (No. 201901D111176) , the open research special project supported by the Bureau of science, technology and industry for National Defense of China (No. WDZC2019JJ006) , the Key R&D program of Shanxi Province (International Co-operation) (No. 201903D421036) , the Project supported by the National Natural Science Foundation of China (Grant No. 52075501) , the Research Project Supported by Shanxi Scholarship Council of China (2021-127) and Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2018002).
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Zeru Wu: Writing – review & editing, Software, Data curation, Writing – original draft. Jianmin Yu: Methodology, Conceptualization. Ziwei Zhang: Software, Data curation. Hongbing Hu: Data curation. Zhimin Zhang: Funding acquisition.
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Wu, Z., Yu, J., Zhang, Z. et al. Static Recrystallization Behavior of Mg–Gd–Y–Zn–Zr Alloy During Annealing Treatment. JOM 74, 2566–2576 (2022). https://doi.org/10.1007/s11837-022-05286-0
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DOI: https://doi.org/10.1007/s11837-022-05286-0