Analysis of Crystallographic Texture and Mechanical Anisotropy of an Extruded Mg-RE Alloy

作者：Zhai Yixuan; Hou Xiuli^*; Yuan Zhizhong; Zhang Peng; Guan Qingfeng

来源：Rare Metal Materials and Engineering, 2018, 47(5): 1341-1346.

DOI：10.1016/s1875-5372(18)30132-2

• magnesium alloy
• rare earth
• EBSD
• Texture
• mechanical property

The impact of hot extrusion on the microstructure and texture, as well as mechanical properties of the Mg-1Gd-lNd (wt%) alloy was investigated. The results demonstrate that the as-cast alloy displays a typical eutectic microstructure consisting of alpha-Mg solid solution and semi-continuous eutectic compounds. After solution treatment, the eutectic compounds are mostly dissolved in the alpha-Mg matrix. The microstructure and texture of the extruded alloy were analyzed by electron backscatter diffraction (EBSD) technique. It is indicated that the extruded alloy exhibits fully recrystallized microstructure and weak basal texture. In detail, the basal planes of the grains majority are spread both towards extrusion direction and transverse direction of the extruded alloy sheet. Especially in the extrusion direction, the orientation distribution is significantly dispersive. The broad spread in orientations results in effective activation of the basal slip and allows the alloy to accommodate higher strains prior to failure. On the other hand, the texture is responsible for the planar anisotropies of the extruded alloy sheet.

• 出版日期2018-5
• 单位江苏大学