PT Journal AU Muller, M Valasek, P TI Research on Aluminium Alloy AlCu4Mg Surface Machined by Abrasive Water Jet SO Manufacturing Technology Journal PY 2017 BP 925 EP 930 VL 17 IS 6 DI 10.21062/ujep/x.2017/a/1213-2489/MT/17/6/925 DE cutting speed; gap width; mass flow of abrasivum; SEM; surface roughness AB The paper deals with a machining of the aluminium alloy by means of an unconventional technology, i.e. an abrasive water jet (AWJ). The paper deals with a study of an influence of the abrasive water jet at its impact on a surface of the machined material, i.e. the aluminium alloy AlCu4Mg of a thickness 20 mm. A topography of the machined surface is evaluated within the research by means of roughness parameters. A surface analysis is also evaluated by means of a scanning electron microscopy (SEM) depending on a cutting speed and a mass flow of the abrasivum. The research results proved an increased influence of the cutting speed and the mass flow of the abrasivum. The optimum cutting speed was 50 mm.min-1, the cut was uniform without a significant grooved zone typical for cuts by means of AWJ technology. ER