Center “Nanomaterials and Nanotechnologies”, National University of Science and Technology "MISIS" (MISiS)

Yu. A. Abuzin, Leading Researcher, Assistant Professor

National University of Science and Technology "MISIS" (MISiS)

N. Yu. Nikitin, Post Graduate Student, e-mail: nikitin5@yandex.ru

The present study shows a way to design new aluminum-based alloys with transition metals. A method based on the electron theory of solids was chosen as the main approach to the design of alloys. As a result of theoretical studies a number of promising alloying elements such as wolfram and molybdenum have singled out. According to our calculations, influence of these elements on the creep resistance of the alloys is maximal. The presence of a number of alloying elements, maximally affect on the change in the elastic stress and their relation to the creep resistance of ordered aluminum-based substitution solutions is shown. In particular, it is such elements as Os and Ru. Alloys with selected alloying elements can be used as construction materials in the aviation and aerospace industry, and are able to demonstrate good mechanical properties. Previously, none of these metals were not included in the list of major alloying elements that form the dispersed hardening of aluminum, because the doping of the aluminum melt with high-melting elements causes significant technological difficulties due to the fact that the dissolution of transition metals in aluminum is inhibit by the formation of solid intermetallic layer, greatly reducing solubility of these metals in aluminum. To prevent this and to obtain aluminum alloys doped with W, Mo, Os and Ru a method, based on the formation of a «precursor» of the solid solution during mechanical activation of starting mixtures of elementary powders to form a solid mixture of aluminum matrix with nanosized particles of refractory alloying elements was proposed.

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