Microstructure Engineering to Control the Degradation Rate in Biocompatible Mg -Zn-Ca-Zr AlloyThursday (27.09.2018) 09:45 - 10:00 S1/03 - 23 Part of:
Magnesium alloys are attractive materials for use in biodegradable implants due to their great biocompatibility, degradability and mechanical properties similar to those of human bones.
The major issue of magnesium alloys is the poor corrosion resistance in physiological environment. It is well known that the corrosion behaviour of Mg alloys is significantly influenced by the microstructure, such as the grain size, boundary and phase distribution.
The aim of this work was to investigate the microstructural changes of the Mg-Zn-Ca-Zr alloy after Friction stir processing (FSP), Electron beam حrocessing (EBP) and their influence on the resultant corrosion resistance.
The results of electrochemical corrosion tests showed that the alloy after EBP and FSP exhibited better corrosion resistance than the alloy in the as-cast state, which can be attributed to significant grain refinement and the distribution of the second phases in the alloy after processing.