Modeling of severe deformation and mechanical properties in Mg-3Al-1Zn alloy through asymmetric hot-

• 作 者: 常丽丽 王轶农 赵镶
• 机 构: Department of Materials Science and Engineering,Dalian University of Technology,Key Laboratory for A
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2008年S1期
• 关键词: extrusion asymmetric texture magnesium basal fabricate tensile equiaxed weakened

One-pass asymmetric hot extrusion performed at 673 K was applied to fabricate an AZ31 magnesium alloy sheet.Finite element method(FEM) was used to model the process of asymmetric hot-extrusion.Simulation results indicate that strain rate gradient through the thickness introduced a grain size gradient along the thickness direction and shear deformation during the asymmetric hot-extrusion results in weakened and tilted(0002) basal texture.The asymmetric hot extrusion effectively weakens the basal texture and improves the ductility at room temperature.

One-pass asymmetric hot extrusion performed at 673 K was applied to fabricate an AZ31 magnesium alloy sheet. Finite element method (FEM) was used to model the process of asymmetric hot-extrusion. Simulation results indicate that gradient rate gradient through the thickness introduced a grain size gradient along the thickness direction and shear deformation during the asymmetric hot-extrusion results in weakened and tilted (0002) basal texture. The asymmetric hot extrusion effectively weakens the basal texture and improves the ductility at room temperature.