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Laser Surface Alloying of an AZ91D Mg Alloy with Al+Y2O3 Powder
Q-H. Bao, K. Zhao, J-K. Liu and X-H. Yin

An Al+Y2O3 alloy coating was prepared on an AZ91D Mg alloy by means of CO2 laser alloying. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to analyse the microstructures, micro-hardness, wear resistance and corrosion resistance of the resulting alloyed layer. The results showed that the hardness, wear and corrosion resistance of alloyed layer were higher than that of AZ91D Mg substrate.

Keywords: AZ91D magnesium alloy, Al+Y2O3 alloy powder, laser surface alloying, wear resistance, corrosion resistance

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