Influece of modifying master-alloys AlZr4, AlZr10, AlSc2 and magnetic-pulse treatment on the structure and physical properties of wrought alloys of the system Al-Mg
AlZr4, AlZr10 and AlSc2 and magnetic-pulse treatment on density (liquid and solid state) the electrical conductivity (solid) and their macro-structure of alloys AMg5 and AMg6 was carried out. Liquid of modifying master-alloys poured into a special devices, providing the cooling rate during the crystallization of ~102, ~103 and ~106 °C/sec. Modifying master-alloys were introduced into the melts from the rate of 0,01 % on the element-modifier. Modifying the melt processing additives of modifying master- alloys contributes to the increase of density of the alloy in liquid and solid states. The electrical conductivity of the alloys after the introduction of modifying master-alloys AlZr4 and AlZr10 reduced. Introduction modifying master-alloy AlSc2 causes an increase in the electrical conductivity of alloys AMg5 and AMg6. This effect is installed for the first time and requires additional research. It was found that the greatest influence on the physical properties of alloys, in comparison with modifying masteralloys AlZr4 and AlZr10, has modifying master-alloy AlSc2, obtained by crystallization in a water-cooled roller mold. Maximum decrease of size of macrograins of alloys were also found with the introduction master-alloys AlSc2. Magnetic-pulse treatment (MPT) of the melts at the axial scheme of the impact, as the introduction of modifying master-alloys, contributes to increasing the density of the alloy in liquid and solid States. The electrical conductivity increases after MPT, like after processing of the melt additives of alloys AlSc2. Decrease of size of macrograins of alloys at magnetic-pulse treatment is comparable with the addition of master-alloys AlZr4. On the basis of comparative studies concluded that magnetic-pulse treatment can be attributed to physical methods of modification. Methods of determining the density and electrical conductivity can be used to express evaluation examined the effectiveness of modifying influences.