Microstructure and properties of Mg–Al–Mn magnesium alloy under shear deformation coupled tension rolling

Abstract

Shear coupling tension rolling is based on equal diameter angle rolling, which meets the requirements of modern industrial development with high production efficiency and short process. It is of great significance to improve the defects of uneven texture distribution and insufficient grain refinement in continuous casting billet rolling process. In this study, the effects of different reduction rate, circular arc radius and tensile angle of shearing roll on the stress and strain of sheet metal were studied by means of high precision constitutive model and rigid plastic finite element analysis software. At the same time, the effects of different process parameters on the microstructure and mechanical properties of rolled magnesium plate were analyzed. The results show that the larger the single pass reduction rate is, the smaller the arc radius of the shear roll is and the smaller the tensile angle is, the greater the equivalent strain and equivalent stress at the corner are. The higher the reduction rate is, the greater the tensile strength and yield strength are and the smaller the extension is. The smaller the arc radius and tensile angle of the shear roll are, the greater the tensile strength and extension are, the smaller the yield strength is, and the easier it is to form dynamic recrystallization.