Abstract:
Slip of an ensemble of edge dislocations in an irradiated ferromagnet with giant magnetostriction under high- energy external impacts is analyzed within the theory of dynamic interaction of defects. An analytical expression for the dependence of dynamic yield strength of an irradiated ferromagnet on dislocation density is obtained. This dependence is non-monotonic and may feature a minimum and a maximum. The minimum forms in the transition from dominant dynamic drag of dislocations by point defects to the dominance of drag by other dislocations (Taylor hardening). The maximum is found at a density of dislocations under which their contribution to the formation of a spectral gap exceeds the contribution of the magnetoelastic interaction with the magnetic subsystem.
Keywords:dislocations, defects, giant magnetostriction, high strain rate deformation, yield strength.
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