Vladimir State University named after Alexander Grigorievich and Nikolai Grigorievich Stoletovs, Vladimir, Russia1 ; Moscow Polytechnic University, Moscow, Russia² ; National University of Science and Technology MISIS, Moscow, Russia³

V. B. Deev*, Chief Researcher¹, Head of the Department of Welding Production Technology and Equipment², Professor of the Department of Metal Pressure Treatment³, Doctor of Technical Sciences, Professor, e-mail: deev.vb@mail.ru

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

Е. S. Prusov, Professor of the Department of Materials Science and Power Engineering, Doctor of Technical Sciences, Associate Professor

The Pacific National University, Khabarovsk, Russia

E. Kh. Ri, Head of the Higher School of Industrial Engineering of the Polytechnic Institute, Doctor of Technical Sciences, Professor

М. А. Ermakov, Associate Professor of the Higher School of Industrial Engineering of the Polytechnic Institute, Candidate of Technical Sciences

*Corresponding author.

The studies results of the effect of complex modifying treatment during melting and crystallization using physical (thermo-speed treatment (TST), irradiation with nanosecond electromagnetic pulses (NEP)) and chemical (modification with alkaline or alkaline earth metals) methods on the processes of structure formation during crystallization of cast aluminum matrix composite materials based on the pseudobinary Al – Mg2Si system in the hypereutectic area of compositions (for example, 15 and 25% (wt.) Mg2Si) are shown. Sets of experimental melts have been carried out to produce endogenously reinforced aluminum matrix composites under the combined influence of TST (from 900°C), calcium modification and irradiation of the melt with NEP during crystallization with variable pulse amplitude parameters (0, 15, 40 kV). During the complex processing of Al – 15Mg2Si – Ca composites, an increase in the total number of Mg2Si particles has been noted (with their grinding by an average of 27–30% at NEP amplitude of 40 kV compared with the composite obtained without applying NEP), but without noticeable morphological changes. For Al – 25Mg2Si – 0.3Ca composites, the dendrite-like morphology of Mg2Si is recorded in all cases, although with a similar fragmenting effect of NEP upon irradiation during crystallization (by 23–25% at NEP amplitude of 40 kV), exhibited in the crushing of Mg2Si particles (with a transition through individual inclusions to compact morphology) and a slight change in the morphology of pseudobinary eutectics ( + Mg2Si). The data of X-ray microanalysis show that the application of NEP during crystallization leads to a local redistribution of elements (Al, Mg, Si, Ca) in the volume of the material, which significantly increases the effectiveness of the calcium modifying effect with additional treatment by physical methods.

The research was carried out at the expense of the grant of the Russian Science Foundation No. 20-19-00687-P, https://rscf.ru/project/23-19-45019 / .

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