LASER CLADDING OF MAGNESIUM ALLOY AZ91D WITH SILICON CARBIDE

L. F. Cai, C. K. Mark and Wei Zhou ()
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L. F. Cai: Precision Engineering and Nanotechnology Center, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
C. K. Mark: Precision Engineering and Nanotechnology Center, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
Wei Zhou: Precision Engineering and Nanotechnology Center, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

Surface Review and Letters (SRL), 2009, vol. 16, issue 02, 215-221

Abstract: Mgalloys are ultralight but their structural applications are often limited by their poor wear and corrosion resistance. The research aimed to address the problem by laser-cladding. Cladding withSiCpowder onto surface of AZ91D was carried out usingNd:YAG laser. The laser-clad surface was analyzed using the optical microscope, SEM equipped with EDS, and XRD and found to containSiCand otherSicompounds such asMg2SiandAl3.21Si0.47as well as much refined α-Mggrains and β-Mg17Al12intermetallics. The laser-clad surface possesses considerably higher hardness but its corrosion resistance is not improved, indicating that the laser-cladding technique can only be adopted for applications in noncorrosive environments where wear is the predominant problem.

Keywords: Magnesium alloy; cladding; laser; silicon carbide; microhardness; corrosion (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012512

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