The influence of alloying dysprosium(Dy)element on the biodegradable behavior and mechanical prop-erty of Mg-6 Zn alloys in a simulated body solution(SBF)solution was studied.The results indicate that Dy significantly...The influence of alloying dysprosium(Dy)element on the biodegradable behavior and mechanical prop-erty of Mg-6 Zn alloys in a simulated body solution(SBF)solution was studied.The results indicate that Dy significantly contributes to grain refinement,and form a distinctive fiber texture in Dy-containing al-loys.The presence of Dy promotes the formation of granular DyZn3 precipitates,which possess a higher electrode potential than the matrix,thus accelerating matrix corrosion.Corrosion results demonstrate that the Dy element is not beneficial to reducing the initial corrosion rate of Mg-6 Zn but is conducive to improving the protective effect of product film as the immersion time increases.Dy-containing alloys exhibit higher strength than Mg-6 Zn while maintaining good plasticity related to grain boundary and precipitation strength effects.Consequently,the incorporation of 2 wt.%Dy into Mg-6 Zn alloys results in a synergistic enhancement of strength,as well as moderate corrosion resistance and fracture elongation.展开更多
基金supported by the National Natural Science Foundation of China(No.52301133)the China Postdoctoral Science Foundation(No.2023M730276)the Young Elite Scientists Sponsorship Program by China Association for Science and Technology(No.YESS20210415).
文摘The influence of alloying dysprosium(Dy)element on the biodegradable behavior and mechanical prop-erty of Mg-6 Zn alloys in a simulated body solution(SBF)solution was studied.The results indicate that Dy significantly contributes to grain refinement,and form a distinctive fiber texture in Dy-containing al-loys.The presence of Dy promotes the formation of granular DyZn3 precipitates,which possess a higher electrode potential than the matrix,thus accelerating matrix corrosion.Corrosion results demonstrate that the Dy element is not beneficial to reducing the initial corrosion rate of Mg-6 Zn but is conducive to improving the protective effect of product film as the immersion time increases.Dy-containing alloys exhibit higher strength than Mg-6 Zn while maintaining good plasticity related to grain boundary and precipitation strength effects.Consequently,the incorporation of 2 wt.%Dy into Mg-6 Zn alloys results in a synergistic enhancement of strength,as well as moderate corrosion resistance and fracture elongation.
