Microstructure and Texture Evolution During the Direct Extrusion and Bending-Shear Deformation of AZ31 Magnesium Alloy

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2019,（6）
• 页码范围: 710-718
• 页数: 9页
• 语种: 英文

摘要

AZ31 alloys were extruded by direct extrusion and bending-shear deformation (DEBS).The microstructure characteristic and texture evolution of DEBSed AZ31 sheets were investigated by electron backscattered diffraction (EBSD).It is found that DEBS technique could effectively refine grains and weaken texture.Besides,we also investigate how twinning affects dynamic recrystallization during hot extrusion.{ 10-12} extension twins can offer nucleation sites and enough energy to trigger dynamic recrystallization.Moreover,the character of direct extrusion and bending-shear die can lead to the activation of non-basal slip system and further dramatically weaken the basal texture of the microstructure with many preactivated basal slip systems.