Dislocation evolution mechanism of plastic deformation process of AZ31 magnesium alloy with different grain size

Abstract

The evolution of grain size and dislocation has a great influence on the plastic deformation of the material. The variation of dislocation lines in the deformation process of magnesium alloys with different grain size was studied by molecular dynamics(MD) simulation technology combined with transmission electron microscope(TEM) experimental methods. The decrease in the size of grains will lead to an increase in the dislocation density during the plastic deformation of the magnesium alloy, and the dislocation line will become tangled. This provides a new means and theoretical basis for studying the plastic deformation of AZ31 magnesium alloy.