Abstract
The influence of a laser melting on both mechanical and electrochemical properties was studied in two carbon steels. Geometry and microstructure of the melt zone were first observed by optical and scanning electron microscopy, in various experimental conditions: with different interaction times and power density, for simple and multiple track melting. A large hardening was induced by the severe quenching resulting from rapid solidification; therefore the presence of hard points on the surface of the material may increase lifetime of specimens and improve tribological properties. This hardening created by the laser melting did not produce deleterious modifications of surface roughness or corrosion behaviour, at least in mildly corrosive saline solutions.
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Pelletier, J.M., Pergue, D., Fouquet, F. et al. Laser surface melting of low and medium carbon steels: influence on mechanical and electrochemical properties. J Mater Sci 24, 4343–4349 (1989). https://doi.org/10.1007/BF00544509
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DOI: https://doi.org/10.1007/BF00544509