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Title of Journal: J Wuhan Univ TechnolMat Sci Edit

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Abbravation: Journal of Wuhan University of Technology-Mater. Sci. Ed.

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Wuhan University of Technology

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10.1016/j.biocon.2010.12.001

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1993-0437

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Laser cladding AlSi/AlSubscript2/SubscriptOS

Authors: Zeqin Cui Hongwei Yang Wenxian Wang Hongliang Wu Bingshe Xu
Publish Date: 2012/12/07
Volume: 27, Issue: 6, Pages: 1042-1047
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Abstract

To improve the wear resistance and corrosion resistance of magnesium alloys a 5 kW continuous wave CO2 laser was used to investigate the laser surface cladding on AZ31B magnesium alloys with AlSi/Al2O3 TiO2 composite powders A detailed microstructure chemical composition and phase analysis of the composite coatings were studied by scanning electron microscopy SEM energy dispersive spectroscopy EDS and Xray diffraction XRD The laser cladding shows good metallurgical bonding with the substrate The composite coatings are composed of Mg17Al12 Al3Mg2 Mg2Si Al2O3 and TiO2 phases Compared to the average microhardness 50HV005 of the AZ31B substrate that of the composite coatings 230HV005 is improved significantly The wear resistances of the surface layers were evaluated in detail The results demonstrate that the wear resistances of the laser surfacemodified samples are considerably improved compared to the substrate It also show that the composite coatings exhibit better corrosion resistance than that of the substrate in 35wt NaCl solution

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