| Popis: |
There are still considerable gaps in the understanding of the recrystallization processes of metallic materials, which reduce the possibility of controlling their course and introducing technological modifications aimed at obtaining desirable properties. The lack of a complete explanation can be attributed to the high complexity of the phenomenon, which consists of a superposition of the local nucleation and grain growth processes. These processes depend strongly on the characteristics of the matrix, which is typically complex and heterogeneously deformed. The phenomenology of the process and its energetic causes are known because they were examined long ago, e.g., (Humphreys & Hatherly, 2002). On the other hand, the relevant physical mechanisms that control the nucleation and growth of new grains are not entirely clear. This uncertainty exists, among other reasons, because the origin of the crystallographic orientations of the nuclei is usually not known. |
