Observations of Texture in Large Scale HPT-Processed Cu
Observations of Texture in Large Scale HPT-Processed Cu
复制标题
大型 HPT 加工铜的织构观察
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Valiev
中科院分区：
文献类型：
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作者：
N. Enikeev;E. Schafler;M. Zehetbauer;I. Alexandrov;R. Valiev
将直径为20 mm、高度为1 mm的块体纳米结构铜样品在6 Gpa的压力下进行了10次旋转热处理。利用最先进的X射线衍射仪，在平行和垂直于扭转轴的方向上测量了织构。为了检查变形的均匀性，用500-m的光斑以3.5 mm的步长进行局部织构测量。纹理数据被分解到剪切面，并根据理想的剪切方向进行分析。在盘面的内部和外部区域都观察到了典型的剪切织构。然而，内部区域的纹理分量强度高于外部区域。这些结果可以用动态晶格弛豫来解释，而不是用形变的不均匀来解释。
Bulk nanostructured Cu samples with 20 mm in diameter and 1 mm in height were processed by HPT at a pressure of 6 GPa by 10 rotations. Measurements of texture by means of state-of-the-art XRD technique have been achieved in directions parallel and normal to the torsion axis. Local texture measurements were performed by a spot size of 500 -m in steps of 3.5 mm in order to examine the homogeneity of deformation. The texture data were resolved to shear plane and analyzed in terms of ideal shear orientations. At both inner and outer areas of the disc plane typical shear textures are observed. However, the intensity of components of textures at inner areas is higher than that of outer one. These results can be interpreted in terms of dynamic lattice relaxations rather than by heterogeneities in deformation.