Publication Type:

Journal Article


Materials Research Express, Institute of Physics Publishing, Volume 6, Issue 8 (2019)



AZ91D, Biomedical applications, corrosion, Corrosion Behaviour, Corrosion resistance, Corrosion resistant alloys, Corrosive effects, Fabrication, Friction, Friction stir processing, Friction stir welding, Homogeneous dispersions, Hydroxyapatite, Magnesium alloy AZ91D, Magnesium alloys, Mechanical and corrosion properties, Mechanical properties, Medical applications, Morphology, Reinforcement, scanning electron microscopy, Surface composites, Surface morphology, transmission electron microscopy


The biomedical applications of magnesium alloy AZ91D are limited because of the dendritic β-Mg17Al12 phase, which degrades the mechanical properties and corrosion resistance. To overcome this, friction stir processing is implemented to fabricate surface composite of AZ91D with hydroxyapatite as reinforcement. This results in refinement of grains and fragmentation of the β phase with homogeneous dispersion of hydroxyapatite in the composite. The combined effect of reinforcement of hydroxyapatite and fragmentation of the β phase resulted in simultaneous improvement in mechanical and corrosion properties. The various phases, surface morphology, and composition of the developed composite are analyzed using a transmission electron microscope and a scanning electron microscope before and after corrosion studies. The mechanism behind the improvement in the property of the developed composite is correlated with the characterization results. © 2019 IOP Publishing Ltd.


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Cite this Research Publication

Vaira Vignesh R., Dr. Padmanaban R., Dr. Govindaraj M., and G. Priyadharshini, S., “Mechanical properties and corrosion behaviour of AZ91D-HAP surface composites fabricated by friction stir processing”, Materials Research Express, vol. 6, no. 8, 2019.