Severe plastic deformation (SPD) is a widely used technique to obtain superior material properties specially mechanical properties. Constrained groove pressing (CGP) is found to be the most attractive SPD technique for the deformation of sheets and plates. However, this technique results in microstructural inhomogeneity during processing. The microstructural inhomogeneity can be alleviated by employing a thermal cycle, which assists in controlled recovery and recrystallisation. The current work focuses on, the microstructure evolution of one pass as-deform CGP sample followed by a short heat-treated (SHT). A correlative imaging technique of transmission Kikuchi diffraction (TKD) and transmission electron microscopy (TEM) showed the presence of dislocation cell structure in an as-deformed condition. The short heat treatment resulted in the transformation of the dislocation cell wall to high-angle boundaries, with a further increase in heat-treatment time resulting in grain growth.

中文翻译：

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约束槽压制Cu-5%Zn合金短热处理组织演变

严重塑性变形 (SPD) 是一种广泛使用的技术，用于获得优异的材料性能，特别是机械性能。约束槽压制 (CGP) 被发现是用于板材变形的最有吸引力的 SPD 技术。然而，这种技术会导致加工过程中的微观结构不均匀。可以通过采用热循环来减轻微观结构的不均匀性，这有助于控制回收和再结晶。目前的工作重点是单程变形 CGP 样品的微观结构演变，然后进行短时间热处理 (SHT)。透射菊池衍射 (TKD) 和透射电子显微镜 (TEM) 的相关成像技术显示在变形条件下存在位错单元结构。