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Energetic properties of the surface layer of magnesium alloys have to be taken into consideration during preparation of elements to operations such as joint, caulking, painting and others surface engineering technologies. Many factors such as geometrical and physicochemical have influence on energetic properties. One of the most important factors is surface roughness after cutting processes, chemical and thermal treatment. High speed machining is one of the technologies currently used in the automotive, aerospace idustry and many other branches of industry. This is due to the several advantages that high-soeed machining offers over conventional machining. Firstly, productivity increase in high speed machining. Secondly, when the cutting speed increases the value of surface roughness parameters. Finally, lower cutting forces generated during high-speed machining of magnesium, compared to conventional machining, allow machining of parts with thin cross-sections. The purpose of the article was to present results of energetic properties of the surface layer of magnesium alloys after conventional cutting (Vc = 200 m/min) and high speed cutting (Vc = 1200 m/min). The paper ends with conclusions.
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