Abstract

The structural phase states and mechanical properties of hypoeutectic silumin subjected to electron beam treatment with energy density of 10–35 J cm−2 are studied according to modern physical materials science. Treating silumin with an electron beam that has an energy density of 25 J cm−2 leads to the formation of a cellular structure in a layer that is up to 40 μm thick. The increase in the hardness of the surface layer of silumin is apparently due to the formation of a high-speed cellular crystallization structure of submicron size with nanoscale layers of the second phase distributed along the cell boundaries.

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