Yin Dongsong, Zhou Yuting, Liu Zhiyuan, Mao Yong, Han Tianming
School of Materials Science and Engineering, Guangdong Ocean University, Yangjiang 529500, China.
School of Mechanical Engineering, Guangdong Ocean University, Zhanjiang 524088, China.
Materials (Basel). 2024 Dec 17;17(24):6166. doi: 10.3390/ma17246166.
Mg-6Zn-0.5Mn as a medical magnesium alloy has good biomechanical properties and corrosion resistance, but as a fracture internal-fixation material, its strength, toughness, and corrosion resistance still need to be improved. In this paper, the element Sr, having good biocompatibility, is used as an alloy element. The effects of different Sr contents (0 wt.%, 0.3 wt.%, 0.6 wt.%, 0.9 wt.%, and 1.2 wt.%) on the microstructure, strength, toughness, and corrosion resistance of rolled Mg-6Zn-0.5Mn alloy were studied. The results are as follows. Sr can influence the recrystallization process. When the Sr content is 0.3 wt.% and 0.6 wt.%, the alloy matrix exhibits both non-recrystallized regions and fine recrystallized regions. When the Sr content reaches 0.9 wt.%, the non-recrystallized region decreases significantly, and the fine recrystallized grains develop into equiaxed grains. With the increase of Sr content, the elongation of the alloy decreases. At a content of 0.9 wt.%, the corrosion resistance reaches its optimum value, with an average corrosion rate of 0.75828 mm/y.
Mg-6Zn-0.5Mn作为一种医用镁合金具有良好的生物力学性能和耐腐蚀性，但作为骨折内固定材料，其强度、韧性和耐腐蚀性仍有待提高。本文选用生物相容性良好的元素Sr作为合金元素。研究了不同Sr含量（0 wt.%、0.3 wt.%、0.6 wt.%、0.9 wt.%和1.2 wt.%）对轧制态Mg-6Zn-0.5Mn合金组织、强度、韧性和耐腐蚀性的影响。结果如下：Sr能影响再结晶过程。当Sr含量为0.3 wt.%和0.6 wt.%时，合金基体同时存在未再结晶区和细小再结晶区。当Sr含量达到0.9 wt.%时，未再结晶区显著减少，细小再结晶晶粒发展为等轴晶粒。随着Sr含量的增加，合金的伸长率降低。当含量为0.9 wt.%时，耐腐蚀性达到最佳值，平均腐蚀速率为0.75828 mm/y。
