ABSTRACT
In summary, the effect of joint alloying by rare earth metals on mechanical properties
o f M g can be different. Its character depends mainly on the joint solubility of the rare earth
metals in solid M g as compared with the solubility of individual elements. This rule is
applicable the most clearly when the solubility of the rare earth metals is small, as in the
case of the elements of the cerium subgroup. If at least one of the rare earth metals has
significant solubility in solid M g , as one of the elements of the yttrium subgroup, the
strengthening effect from individual rare earth metals can be superimposed on each other
so that the joint alloying w i l l be accompanied by a higher strengthening effect than that
from each of the rare earth metals alone.