Abstract:
Current investigation presents the use of Friction Stir Processing (FSP) to improve
the corrosion resistance of pure magnesium for biomedical applications. FSP has been used to
incorporate hydroxyapetite (HAP) into Mg-surface so as to modify the chemical composition.
FSP was done within a matrix of different parameters and conditions. Influence of various
parameters on microstructure was also clearly observed. XRD analysis confirmed the presence
of HAP, whereas SEM images revealed a uniform distribution of the imbedded phase. Microhardness
and in-vitro corrosion studies were also performed. Influence of grain size on hardness was validated by Hall-Petch relationship. Corrosion behavior was explained on the basis of texture, which indicated better corrosion resistance in comparison to the pure Mg.Therefore, the study reveals that the proposed FSP methodology can be useful tool to improve mechanical and corrosion properties of pure Mg for biomedical applications.
