Wuhan Textile University, Wuhan, China¹ ; National University of Science and Technology MISiS, Moscow, Russia²:
V. B. Deev, Professor of the Faculty of Mechanical Engineering and Automation¹, Chief Researcher of the Laboratory “Ultrafine-grained Metallic Materials”², Professor of the Chair for Metal Forming², Doctor of Technical Sciences, e-mail: deev.vb@mail.ru

Vladimir State University named after Alexander and Nikolai Stoletovs, Vladimir, Russia:

E. S. Prusov, Associate Professor, Chair for Technology of Functional and Structural Materials, Candidate of Technical Sciences, e-mail: eprusov@mail.ru

Pacific State University, Khabarovsk, Russia:

E. Kh. Ree, Professor, Head of the Chair for Foundry and Metal Technology, Doctor of Technical Sciences, e-mail: erikri999@mail.ru
E. D. Kim, Lecturer, Chair for Foundry and Metal Technology, Candidate of Technical Sciences, e-mail: 010848@pnu.edu.ru

One of the promising groups of cast endogenously reinforced aluminum matrix composites are materials in which the role of reinforcing particles is played by primary compounds of crystallization origin, in particular, based on the pseudobinary Al – Mg₂Si system. However, under the conditions of traditional casting and metallurgical processes, primary Mg₂Si crystals precipitate in the form of dendrite-like complexes of unfavorable morphology and are relatively large in size, and the tendency to their coarsening increases with an increase in the volume content of the Mg₂Si phase. In this regard, to ensure a sufficient level of mechanical and operational properties of cast composite materials of the Al – Mg₂Si system, it is necessary to use additional modifying treatment. The article assesses the effect of treatment of melts with nanosecond electromagnetic pulses (NEMP) on the change in the nature of the distribution of chemical elements in the structural components of aluminum matrix composite materials Al – 20% (wt.) Mg₂Si. It is shown that an increase in the irradiation amplitude to 15 kV at a frequency of 1 kHz was accompanied by an increase in the content of magnesium in the α-solid solution, as well as magnesium and silicon in the pseudobinary eutectic (α + Mg₂Si), while the content of elements in the primary crystals of the Mg2Si phase remained unchanged. regardless of melt processing parameters. At the same time, the most highly dispersed eutectic is observed at the specified processing parameters. It is noted that the irradiation of the melt with NEMP reduces the fraction of local areas of the metal base inside the primary Mg₂Si crystals, which leads to an increase in their microhardness to a level of 600–630 HV. The results obtained open up new possibilities for increasing the overall efficiency of the reinforcing action of the endogenous Mg₂Si phase by modifying the morphological structure of its crystals.

This research was funded by the Russian Science Foundation (Project No. 20-19-00687).

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