Abstract The effect of torsional rate on the microstructure and texture of pure Cu at an equivalent strain of 3.94 was investigated by electron backscatter diffraction technique. The microstructure, texture evolutions and microhardness at different regions along radial directions were quantitatively analyzed. The results demonstrated that the grain size and microhardness reduced gradually along the radial direction, showing characteristics of gradient distribution. However, the torsional rate didn't show significant effect on them. The texture results showed that typical torsion textures developed during deformation. A/-A texture and B/-B texture were the major components in the center and 1/4 layer, and showed similar changes at different regions. While at the edge, C texture prevailed, and its strength increased as the torsional rate rose. The torsional rate, however, didn't show significant effect on the texture development of A/-A and B/-B textures as well.

中文翻译：

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扭转速率对纯铜梯度显微组织、织构演变和显微硬度的影响

摘要 采用电子背散射衍射技术研究了扭转速率对等效应变为3.94时纯铜组织和织构的影响。定量分析了沿径向不同区域的显微组织、织构演变和显微硬度。结果表明，晶粒尺寸和显微硬度沿径向逐渐减小，呈梯度分布特征。然而，扭转速率对它们没有显示出显着影响。织构结果表明，在变形过程中形成了典型的扭转织构。A/-A 纹理和 B/-B 纹理是中心和 1/4 层的主要成分，并且在不同区域表现出相似的变化。而在边缘处，C纹理占优势，其强度随着扭转率的增加而增加。