Physical modelling of dynamic recrystallization of the cyclic peak type
Document typeMaster thesis (pre-Bologna period)
Rights accessOpen Access
Dynamic re-crystallization is a process of discontinuous crystallization during hot-working. This is a very interesting process that has been modeled in several ways. In this project I’ve tried to model the birth, increment, and extinction of crystallites by using only the Avrami equation. The Avrami equation is quite simple to write. It describes the occurrence of newborn crystallites during nucleation and growth processes. The equation establishes that the ratio of the real volume and the extended volume is equal to the fraction of free space. We will get more in detail in the chapter 2. While in a crystallization process the free space is simply the uncrystallized space, in re- crystallization processes it must be redefined as the space available for growth, regardless if it was previously crystallized. The project consisted in write the adequate model and a code to check its validity. I then made several tests with the final code, with variations on each parameters, and I gathered it in the chapter 3.