ABSTRACT
There are similarities and differences between the binary magnesium alloys with various
rare earth metals in the kinetics of solid solution decomposition. The most impressive
features of them were established during isothermal ageing [106, 259]. The results of
respective experiments are presented in Figure 71 (hardness) and Figure 72 (electrical
resistivity). The alloys used in the experiments were in the form of extruded rods. They
contained various rare earth metals of concentrations close to the maximum solubility in
solid M g in every system. Samples prepared from the rods were solution treated and then
aged at the same temperature 200°C. Solution treatment was performed by heating of the
samples at temperatures slightly below eutectic ones in every system followed by
quenching in water of room temperature. Samples of all the alloys were aged
Figure 72. Resistivity of the M g - R E alloys versus ageing time at 200°C. R E content is shown in mass %.
