Recrystallization Behavior of a Mg-5Zn Alloy Influenced by Minor SiCp during Hot Compression

Quanxin Shi; Cuiju Wang; Kunkun Deng; Kaibo Nie; Wei Liang

doi:10.3390/ma15238498

Recrystallization Behavior of a Mg-5Zn Alloy Influenced by Minor SiC_p during Hot Compression

Materials (Basel). 2022 Nov 29;15(23):8498. doi: 10.3390/ma15238498.

Authors

Quanxin Shi^{1

2}, Cuiju Wang^{1

2}, Kunkun Deng¹, Kaibo Nie¹, Wei Liang^{1

2}

Affiliations

¹ Shanxi Key Laboratory of Advanced Magnesium-Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
² Instrumental Analysis Center, Taiyuan University of Technology, Taiyuan 030024, China.

Abstract

The influence of minor SiC_p on the dynamic recrystallization (DRX) and dynamic precipitation behaviors of the Mg-5Zn matrix were investigated through the hot compression test. The results showed that the addition of SiC_p improved the DRXed ratio of Mg-5Zn matrix, but the recrystallized grains in 1 vol.% 5 μm SiC_p/Mg-5Zn material were mainly formed by the "bulging" nucleation of the grain boundary at a low compressive strain (~0.05, ~0.1 and ~0.35), and PDZ (particle deformation zone) around SiC_p had little effect on the recrystallization nucleation. However, the fine recrystallized grains appeared around the particles when the compressive strain reached ~0.7, which was attributed to the promotion effect of PDZ on recrystallization nucleation. This shows that PDZ around particles can promote DRX nucleation under large strain. Meanwhile, compared to the Mg-5Zn alloy, the volume fraction and size of the secondary phase in the SiC_p/Mg-5Zn material increased due to the influence of SiC_p on the recrystallization behavior of Mg-5Zn matrix.

Keywords: DRX mechanism; Mg alloy; compression; precipitation.

Grants and funding

This work was supported financially by the “National Natural Science Foundation of China” (Grants. 52271109 and 52001223). The authors also thank the Support from the Fundamental Research Program of Shanxi Province (Grant: 202103021223043), the “National Key Research and Development Program for Young Scientists” (Grant. 2021YFB3703300), and the Special Fund Project for Guiding Local Science and Technology Development by the Central Government (Grant.YDZJSX2021B019).