Some Features of the Temperature and Strain Rate Behavior of Plastic Flow of Functional Magnesium Alloys

The results of mechanical tests of magnesium alloys of ternary systems promising for medical applications, Mg-Zn-Ca and Mg-Zn-Y, are presented. A peculiar temperature and strain-rate sensitive behavior of the stress-strain curves is discussed, in particular, a simultaneous significant increase in the plasticity and a decrease in the interval of stable plastic flow with the increasing temperature. The experimentally obtained value of the dislocation annihilation activation energy is expected to predict the true plastic strain corresponding to the point of plastic flow stability loss at different test temperatures. The prospects for a possible use of the results in technological processes for the manufacture and operation of medical devices are discussed.