|internt-fagligt, 2. modul, 2007, id:239|
|Findes på RUb:||Ja|
In this project, the difference in kinetics and structural development, during recrystallization of inhomogenous and homogenous nucleation sites, is examined. The question is answered by simulating an excisting model, the JMAK model for recrystallization, and changing the parameters in the simulation, so that recrystallization of inhomogenous nucleation sites is simulated. The conclusion is, that the nucleation sites is of importance for kinetics and structural development during recrystallization. The maximum of the Sv(Vv) kinetics curve for the inhomogenous nucleation sites is found at Vv=0.41 and Sv=0.17. The equivalent maximum for the homogenously distributed nucleation sites is found at Vv=0.49 and Sv=0.21. Ind addition the Sv(Vv) kinetics curve is found to be translated leftwards. By examination of the histograms for the grain size distributions of inhomogenous and homogenous nucleation sites at full recrystallization it is found, that the inhomogenous nucleation sites result in a larger spread than the homogenous ones. This is also seen in the simulated microstructures.