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Laser cladding of zirconium on magnesium for improved corrosion properties

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Abstract

Laser cladding of Mg-2 wt% Zr, and Mg-5wt% Zr powder mixture onto magnesium was carried out. The microstructure of the laser clad was studied. From the microstructural study, the epitaxial regrowth of the clad region on the underlying substrate was observed. Martensite plates of different size were observed in transmission electron microscope for Mg-2wt% Zr and Mg-5wt% Zr laser clad. The corrosion properties of the laser clad were evaluated in sea-water (3.5% NaCl). The position of the laser claddings in the galvanic series of metals in sea-water, the anodic polarization characteristics of the laser claddings and the protective nature and the stability of the passivating film formed have been determined. The formation of pitting on the surface of the laser clad subjected to corrosion has been reported. The corrosion properties of the laser claddings have been compared with that of the commercially used magnesium alloy AZ91 B.

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Authors and Affiliations

  1. Laser Aided Materials Processing Laboratory, Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, Illinois, USA

    R. Subramanian, S. Sircar & J. Mazumder

Authors
  1. R. Subramanian
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  2. S. Sircar
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  3. J. Mazumder
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Subramanian, R., Sircar, S. & Mazumder, J. Laser cladding of zirconium on magnesium for improved corrosion properties. J Mater Sci 26, 951–956 (1991). https://doi.org/10.1007/BF00576771

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  • DOI: https://doi.org/10.1007/BF00576771

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