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

被引：11

作者：

XiaoYe Liu ^{[1
]}

LiWei Lu ^{[1
,2
]}

Kun Sheng ^{[1
]}

Tao Zhou ^{[3
]}

机构：

[1] Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology

[2] School of Materials Science and Engineering, Central South University

[3] School of Materials Science and Engineering, Chongqing University of Technology

来源：

Acta Metallurgica Sinica(English Letters) | 2019年 / 32卷 / 06期

关键词：

Magnesium alloys; Extrusion; Grain refinement; Texture evolution;

D O I：

暂无

中图分类号：

TG146.22 []; TG376 [挤压工艺];

学科分类号：

080502 ; 080201 ; 080503 ;

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.

引用

页码：710 / 718

页数：9