Simulation and finite element analysis of continuous multi-pass hot rolled AZ31B magnesium alloy sheets

摘要

The deformation behavior of the continuous multi-pass hot rolling AZ31B sheets is tested in a Gleeble 1500 thermo-mechanical simulator. The evolution of microstructurc during the deformation process is observed and the constitutive relation of AZ31B alloy is analyzed by a finite element method. The results show that the deformation behavior of continuous multi-pass hot rolling of AZ31B sheets is totally different with that of single pass rolling. The work hardening mechanism plays a more important role than the dynamic rccrystallization docs during the continuous multi-pass deformation process under different strain rates from 0.01 s~(-1) to 5 s~(-1). The calculated value of high temperature deformation activation energy of hot rolling AZ31B sheets is 171 kJ mol~(-1). The FEM simulation provides a detailed distribution of temperatures, stress and equivalent strains in the continuous multi-pass rolling sheet.