Commercially AA1070 aluminium was processed by micro/mesoscale equal channel angular pressing (ECAP) up to four passes, via route , to achieve fine grain structure and thereby enhancing the mechanical properties. Subsequently, the samples subjected to ECAP processing underwent an extrusion deformation in micro/mesoscale. The microstructural evolution of the deformed structures was followed using electron backscatter diffraction. The findings confirm that a remarkable refinement in the grain structure was observed as a result of the gradual transformation of the low angle grain boundaries into high angle grain boundaries through the grain subdivision mechanism. Consequently, a substantial improvement of the mechanical properties of the extruded material is promoted compared to the samples subjected to ECAP processing.

中文翻译：

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等通道角压 AA1070 合金在微/中尺度挤压过程中的显微组织演变

商业上的 AA1070 铝通过微/中尺度等通道角挤压 (ECAP) 加工多达四道次，通过路线，获得细晶粒结构，从而提高机械性能。随后，经过 ECAP 处理的样品经历了微/中尺度的挤压变形。使用电子背散射衍射跟踪变形结构的微观结构演变。研究结果证实，由于通过晶粒细分机制，低角度晶界逐渐转变为高角度晶界，观察到晶粒结构的显着细化。因此，与经过 ECAP 处理的样品相比，挤压材料的机械性能得到了显着改善。