Microstructure and wear property of laser cladding Al+SiC powders on AZ91D magnesium alloy

Al+SiC powders were pulse-laser (Nd–YAG) cladded on AZ91D magnesium alloy. The microstructure, chemical composition and phase analyses of the cladding layer were studied by scanning electron microscopy, EDX analysis, and X-ray diffraction measurement. The composite coating is composed of SiC and β-M...

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Published in:Optics and lasers in engineering 2010-05, Vol.48 (5), p.526-532
Main Authors: Zheng, B.J., Chen, X.M., Lian, J.S.
Format: Article
Language:English
Subjects:
Cladding
Composite coatings
Laser beam cladding
Laser cladding
Magnesium alloys
Magnesium base alloys
Microhardness
Microstructure
Particulate composites
Protective coatings
Silicon carbide
Wear
Wear resistance
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description Al+SiC powders were pulse-laser (Nd–YAG) cladded on AZ91D magnesium alloy. The microstructure, chemical composition and phase analyses of the cladding layer were studied by scanning electron microscopy, EDX analysis, and X-ray diffraction measurement. The composite coating is composed of SiC and β-Mg 17Al 12 phases. The laser cladding showed very good bonding with the magnesium alloy substrate. The surface hardness of cladding coating is higher than that of substrate and increases with the increase of SiC content in the cladding. Sliding wear tests conducted in a pin-on-disc wear testing apparatus showed that the composite coating with SiC particles and in situ synthesized Mg 17Al 12 phase remarkably improved the wear resistance of the AZ91D magnesium alloy.
doi_str_mv 10.1016/j.optlaseng.2010.01.001
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source ScienceDirect Freedom Collection 2022-2024
subjects Cladding
Composite coatings
Laser beam cladding
Laser cladding
Magnesium alloys
Magnesium base alloys
Microhardness
Microstructure
Particulate composites
Protective coatings
Silicon carbide
Wear
Wear resistance
title Microstructure and wear property of laser cladding Al+SiC powders on AZ91D magnesium alloy
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