中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 5 May 2025 |
（1. Guangdong Key Laboratory for Advanced Metallic Materials Processing and Forming, National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China;
2. Department of Mechanical, Industrial and Mechatronics Engineering, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada）
Abstract:A low-alloyed Mg-1.2Zn-0.1Ca alloy was extruded at 150 °C, followed by annealing at varying temperatures of 200-300 °C. The microstructural evolution and static recrystallization kinetics were investigated. The as-extruded alloy exhibited a bimodal structure consisting of fine recrystallized grains of 0.8 μm and coarse un- recrystallized grains, with a recrystallized fraction of ~67%. The recrystallization process at 250 °C was identified to be appropriate with a slow recrystallized grain growth rate. The grains with and orientations exhibited preferential growth advantages during long-term annealing. Grain boundary segregation exerted a strong Zener pinning effect on the grain boundaries, which not only increased the grain growth activation energy, but also affected the texture evolution.
Key words: Mg-Zn-Ca alloy; annealing; texture; grain growth; static recrystallization kinetics
