Ultra-strong magnesium alloy with novel nanostructures

Generally, two approaches were employed to develop stronger materials： one is to increase dislocations densi- ties or/and impede their motions, such as solid solution strengthening, grain refinement strengthening and precipitate strengthening; the other is amorphization which completely eliminates dislocations, and the deformation mechanism also changes from a dislocation-activated mode to the activation of shear bands. However, too much defects can cause a defect-softening behavior. For example,