Spoluautoři KRÁL Robert, JANEČEK Miloš

AE21 magnesium alloy was prepared by extrusion and posterior equal channel angular pressing (ECAP). Afterwards the microstructure evolution, the mechanical properties evolution and corrosion resistance evolution was studied. The microstructure was observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The corrosion resistance was evaluated by electrochemical impedance spectroscopy (EIS). The thermomechanical processing by ECAP led to substantial grain refinement that affected both the mechanical and corrosion properties. The yield strength was enhanced by ECAP till two passes and then was decreasing till eight passes. The corrosion resistance was decreasing till two passes and afterwards was the corrosion resistance almost identical till eight passes. Both the evolution of the mechanical and corrosion properties were connected to the microstructural changes produced during ECAP.