Fundamental Formation Laws of Phase Composition, Structure and Properties of Aluminium Materials Manufactured by Mechanical Alloying

The present investigation objective is to develop the technological process for strengthened aluminium alloys formation of different density based on mechanical alloying. Standard aluminium and magnesium powders were used as initial materials. Lithium was introduced in free state and binded in hydroxide LiOH. Granulated composition with mean particle size 0.2 ... 0.3 mm is the product of mechanical alloying. Thermal treatment of granulated compositions and hot compaction of semiproducts initiate phase transformations which contribute to thermodynamic equilibrium state of the alloys. Alloy base is characterized by micro- or small crystalline structure and presents a solid solution of magnesium and lithium in aluminium strengthened by nanocrystalline inclusions of aluminium oxides, magnesium and aluminium carbides which results in high strength of said alloys at low and high temperatures.