Aluminium alloys doped with lithium, copper and magnesium

Phase composition of M-Li-Cu-Mg alloys in region aluminium reach is studied by microstructural, micro- and X-ray diffraction analysis. Binary phases Θ, AlLi and phases of ternary systems: Al-Cu-Li, Al-Cu-Mg, Al-Li-Mg are at equilibrium with aluminium solid solution haw compounds in the system region studied are not detected. Cross sections of isothermal tetrahedron at 400 deg C with constant copper content (1,5 and 2,8%) are plotted