中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 36 No. 2 February 2026 |
（a College of Materials Science and Engineering, Hohai University, Changzhou 213200, China;
b Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China;
c Institute of Medical Devices (Suzhou), Southeast University, Suzhou 215163, China;
d Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing 211167, China;
e Baowu Magnesium Technology Co., Ltd., Nanjing 211200, China;
f Suqian Research Institute of Hohai University, Suqian 223800, China）
Abstract:To investigate the aging mechanisms and elucidate the correlations between unstable microstructure and performance in biodegradable Zn alloys, the accelerated aging experiment was conducted on a high-performance wrought Zn-0.1Mg alloy by annealing at 200 °C for varying durations. The findings reveal that the tensile strength of the alloy rapidly and significantly declines with prolonged annealing time, decreasing from 383 MPa for the as-received alloy to 102 MPa for the alloy subjected to 1440 min of annealing. The primary factors contributing to this considerable reduction in strength are static recrystallization, grain coarsening, and dislocation annihilation. Initially, the ductility of the alloy shows fluctuations, ultimately experiencing a marked decrease after extended annealing. This decline is linked to the grain growth and heightened texture intensity, while the unusual increase in ductility observed between 30 and 120 min of annealing is likely due to the formation of twins. In addition, due to rapid grain growth and an increase in precipitates and twins, the corrosion resistance of the alloy in Hank’s solution has worsened, with the corrosion rate rising from 0.037 to 0.069 mm/a following 300 min of annealing.
Key words: Zn-0.1Mg alloy; annealing; microstructure evolution; mechanical properties; corrosion behavior
