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A literature review of the current state of magnesium alloy production technology is given, alloy properties and the influence of alloying elements on them are analyzed, microstructure and the main phases forming in the cast and wrought magnesium alloys are determined, a classification of modern magnesium alloys of foreign production is presented, further paths of their development are outlined, and problems in magnesium alloy application are defined. Magnesium alloying by other elements (Al, Mn, Zn, Si, Re, etc.) or strong nanoparticles allows significant improvement of its existing properties so as to expand its scope of application. Current problems in magnesium alloy application (flammability, combustibility, surface durability, biosolubility, corrosion resistance, weldability) are solved by alloying, controlling the chemical and structural-phase composition, application of the respective modes of thermomechanical treatment and surface hardening. Ref. 27, Tabl. 2, Fig. 9. [ABSTRACT FROM AUTHOR]

The regularities of joint structure formation in diffusion pressure welding through multilayer interlayers based on AL-Si and Al-Cu aluminum systems with eutectic, obtained by electron beam deposition in vacuum, were studied, using SiCp-AMg5 aluminum composite, as an example. It is shown that the intermediate multilayer layers of eutectic ‘composition provide permanent joints without degradation of the properties of the base material at a temperature of 500 °C, which corresponds to the beginning of intensive plastic deformation of the interlayer under pressure. It is established that the nature of the diffusion interaction of the components of the interlayer and the composite and the phase composition of the eutectic affect the structure and the chemical composition of the joint. Conditions that prevent the formation of barrier layers at the interlayer/composite interface, namely layer alloying or intermetallic particle formation in it before the welding process, promote intensive mass transfer of interlayer and composite components, ensuring homogeneity of the structure and microhardness of the joint. Mechanisms for forming SiCp-AMg5 composite joint through multilayer intermediate layers based on aluminum systems with eutectic of different types — simple, consisting of system components (for example AI-Si) and one containing an intermetallic based on components (for example AL-Cu) are proposed. [ABSTRACT FROM AUTHOR]