Synthesis and characterization of al–siC composite coatings on 316L stainless steel fabricated via laser cladding technique.
Kanyane, L.R. Malepe, T.J. Malatji, N. Popoola, A.P.I.
Kanyane, L.R.
Malepe, T.J.
Malatji, N.
Popoola, A.P.I.
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Abstract
Al–SiC composite coatings were successfully fabricated on 316L stainless steel substrate using laser cladding technique. The microstructure of the coatings was characterized by Scanning electron microscope (SEM) together with energy-dispersive spectrometer (EDS), while the phases that formed were identified using x-ray diffractometer (XRD) equipment. The
microhardness properties of the cladded samples were measured using Vickers hardness tester machine. Electrochemical behavior of the fabricated alloy was analyzed using Autolab potentiostat equipped with nova software. The results revealed that the coatings exhibited a dendritic microstructure with SiC particles segregated along the grain boundaries. Refinement
of the microstructure was achieved at high laser scan speeds and coatings synthesized under these conditions also exhibited improved hardness, corrosion and wear resistance.
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Date
2021-08-26
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Publisher
Springer
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Keywords
316L Stainless steel (SS) microhardness, Microstructural evolution, Processing parameters, Pre-mixed