In the current examination, a large-area stirred zone has been created in Al6061 through the application of overlapping friction stir processing. The investigation focused on examining the microstructural and texture changes in friction stir processed Al6061, using the electron backscattered diffraction technique. Electron backscattered diffraction images provided valuable insights into the recrystallization process, revealing the presence of fine-grained structure with high-angle boundaries in the large-area stirred zone attributed to intense plastic straining and dynamic recrystallization. The use of the tool caused significant plastic straining, resulting in the development of the A- (1 1 1) {1 1 0} texture component. Mechanical testing demonstrated a noteworthy increase in ductility after processing. However, the microhardness and strength were observed to be inferior to the base material due to elevated thermal cycling.

中文翻译：

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重叠搅拌摩擦加工对 Al6061 微观结构演变、织构发展和力学性能的影响

在目前的研究中，通过应用重叠搅拌摩擦加工，在Al6061中形成了大面积的搅拌区。该研究的重点是使用电子背散射衍射技术检查搅拌摩擦处理的 Al6061 的微观结构和织构变化。电子背散射衍射图像为再结晶过程提供了有价值的见解，揭示了大面积搅拌区中由于强烈的塑性应变和动态再结晶而存在具有高角度边界的细晶结构。该工具的使用引起了显着的塑性应变，从而形成了 A- (1 1 1) {1 1 0} 纹理组件。机械测试表明加工后延展性显着增加。然而，由于热循环升高，显微硬度和强度低于基材。