The deteriorated degradation resistance of Mg alloy microtubes for vascular stent under the coupling effect of radial compressive stress and dynamic medium
Available online 12 October 2023
Full Length Article
Mengyao Liu, Yabo Zhang, Qingyuan Zhang, Yan Wang, Di Mei, Yufeng Sun, Liguo Wang, Shijie Zhu, Shaokang Guan
Abstract
The degradation of Mg alloys relates to the service performance of Mg alloy biodegradable implants.
In order to investigate the degradation behavior of Mg alloys as vascular stent materials in the near service environment, the hot-extruded
fine-grained Mg-Zn-Y-Nd alloy microtubes, which are employed to
manufacture vascular stents, were tested under radial compressive stress
in the dynamic Hanks’ Balanced Salt Solution (HBSS). The results
revealed that the high flow rate accelerates the degradation of Mg alloy
microtubes and its degradation is sensitive to radial compressive
stress. These results contribute to understanding the service
performance of Mg alloys as vascular stent materials.