EBSP investigation of microstructure and texture evolution during equal channel angular pressing of aluminium
EBSP investigation of microstructure and texture evolution during equal channel angular pressing of aluminium
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DOI：
10.1016/s0921-5093(03)00055-8
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发表时间：
2003-11
期刊：
影响因子：
6.4
通讯作者：
W. Cao;A. Godfrey;Q. Liu
中科院分区：
文献类型：
--
作者：
W. Cao;A. Godfrey;Q. Liu
商业纯铝（99.5%Al）通过等通道转角挤压（ECAP）使用多达10道次使用路线Bc变形。利用电子背散射花样技术对显微组织和织构的演变进行了表征。通过使用体视学参数单位面积长度（LA），发现平均仅在10道次之后才形成亚微米晶粒尺寸。然而，在样品中存在显著的不均匀性，并且在某些地方，即使在10次通过之后也没有形成亚微米晶粒尺寸。在应变范围内，织构强度随应变的增加而增加。与其他变形方式的组织演变比较表明，ECAP更类似于循环挤压-压缩而不是冷轧。
Commercial purity aluminum (99.5% Al) was deformed by equal channel angular pressing (ECAP) using up to 10 passes using route Bc. The evolution of microstructure and texture was characterized using the electron back scattered pattern technique. By use of the stereological parameter length per unit area (LA), it was found that on average a sub-micron grain size is developed only after 10 passes. Significant heterogeneity exists however in the sample and in some places a sub-micron grain size is not developed even after 10 passes. The texture strength was found to increase with increasing strain over the strain range investigated. Comparison of microstructural evolution with other deformation modes suggests that ECAP is more similar to cyclic extrusion-compression than to cold-rolling.