OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 Fig. 4. X-ray diffraction pattern of a silicon powder sample with phase identification Fig. 3. X-ray diffraction pattern of an aluminum powder sample with phase identification performed more oxygenated, so it was decided to reduce the activation time for further studies and complete the experiment in laser melting for the powder composition after one hour of mechanical treatment. Thus, as a result of the experiment in formation of the powder composition Al – 91 wt. %, Si – 8 wt. %, Mg – 1 wt. % in the globe mill, globular powder was produced for further formation of an alloy in the process of selective laser melting. It is globular powder that is considered to be the qualified material for the SLM process as this form of particles allows increasing both the density of powder application and the rheological characteristics. In Figure 7 we provide the X-ray diffraction pattern with the identification of the phases of the powder sample obtained by mixing for 1 hour. The phase composition is presented by two phases: Al and Si. The Fig. 5. SEM microphotograph of a mixture of aluminum, magnesium and silicon powders after 1 hour of mechanical activation (a, b) and after 2 hours of mechanical activation (c, d) а b c d
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