Open AccessThermal stability of the hypereutectic silumin structure subjected to a pulsed electron beam treatment
Author(s) -
Е. А. Петрикова,
Yu. F. Ivanov,
А. Д. Тересов,
M. E. Rygina
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1799/1/012022
Subject(s) - materials science , eutectic system , metallurgy , silicon , thermal expansion , titanium , cathode ray , crystallization , brittleness , composite material , corrosion , thermal stability , electron , microstructure , chemical engineering , physics , quantum mechanics , engineering
Hypereutectic silumins have many positive properties - low density, high specific strength and corrosion resistance. They are non-magnetic, retain their strength at low, up to cryogenic temperatures, have a relatively low thermal expansion coefficient, high modulus of elasticity, increased wear resistance in friction pairs, etc. The structure of hypereutectic silumin is formed by a plastic eutectic matrix and brittle primary silicon crystals larger than 100 urn, and also contains crystals of aluminides of iron, copper, titanium and zirconium. Silumin of hypereutectic (18 wt% Si) composition was modified by irradiating the specimens by an intense pulsed electron beam. It was found that irradiation of hypereutectic silumin with an electron beam leads to a significant decrease in the number of micropores, the formation of a structure of high-speed cellular crystallization.