Zn-based biodegradable materials are extensively investigated as materials with a high potential for the fabrication of temporary implants. In clinical practice, the surface properties of the implant can play a crucial role in its interaction with the host tissue.

Laser shock peening (LSP) is a method allowing modification of the microstructure of the surface and sub-surface layers by the intensive deformation caused by energy waves forming during the interaction of the metallic substrate with a laser beam. As a result, grain refinement and implementation of compressive residual stresses into the surface layer with a thickness 1 – 2 mm takes place. As a result, an increase in surface and hardness and wear resistance are observed. Besides, enhanced resistance to corrosion stress cracking and fatigue damage is usually obtained by the LSP treatment.

In the presented study, we will investigate the microstructure changes of a Zn-Mg-Sr biodegradable alloy after the LSP process, discuss the mechanisms staying behind them and their impact on mechanical behavior on the material.