B Mehrjou - School of Metallurgy and Materials Engineering, University of Tehran, Tehran, P.O. Box۱۱۱۵۵-۴۵۶۳, Iran
M. Heydarzadeh Sohi - School of Metallurgy and Materials Engineering, University of Tehran, Tehran, P.O. Box۱۱۱۵۵-۴۵۶۳, Iran
R Soltani - School of Metallurgy and Materials Engineering, University of Tehran, Tehran, P.O. Box۱۱۱۵۵-۴۵۶۳, Iran
M.J Torkamany - Engineering Faculty, Metallurgical Group, University of Tarbiat Modarres, Tehran, P.O. Box ۱۴۱۱۵-۱۴۳, Iran

AZ91 magnesium alloy pre- sprayed with WC-5 wt% Co powder was surface melted by pulsed Nd-YAG laser. Microstructure, chemical composition and phase analyses of the treated layers were studied by utilizing scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffractometry and micro-hardness machine. Laser treated layers showed much finer structure compared to the original base material with fine distribution of WC particles. Different intermetallic compounds were detected in the fabricated layers and the hardness of treated surfaces was substantially higher than that of the base material

AZ91, Nd-YAG laser, Surface melting, WC-Co