Investigating the effect of multi-directional forging process on microstructure and mechanical properties of biodegradable Zn-۰.۵Mn-۰.۳Ca alloy

In this study, the Zn-۰.۵Mn-۰.۳Ca alloy was processed through extrusion, annealing, and one to three passes of multi-axial forging (MAF) to evaluate the evolution of microstructure, precipitation behavior, and mechanical properties. The results show that increasing the number of MAF passes leads to progressive grain refinement, dynamic precipitation of Mn-rich phases, and enhanced microstructural homogeneity. Consequently, both strength and ductility improved significantly, with the three-pass condition exhibiting the best combination of ultra-fine grains, uniform precipitate distribution, and superior tensile performance. These findings demonstrate the effectiveness of MAF in optimizing Zn-based alloys for biodegradable stent applications.

کلیدواژه ها:

Biodegradable metals ، Dynamic recrystallization ، Multi-axial forging ، Zinc alloys