Regensburg 2007 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 5: Interfaces I

MM 5.2: Vortrag

Montag, 26. März 2007, 10:30–10:45, H6

Influence of low angle grain boundaries on recrystallization — •Myrjam Winning — Max-Planck-Institut für Eisenforschung GmbH, Abteilung Mikrostrukturphysik und Umformtechnik, Düsseldorf, Germany

Recrystallization is one of the most effective ways to change the microstructure as well as the properties of crystalline materials. On one hand primary static recrystallization is defined by nucleation and growth, whereas the growth takes place by the motion of high angle grain boundaries. On the other hand it is known that even low angle grain boundaries are able to move and therefore able to contribute to microstructural changes. But although there is some experimental evidence that low angle grain boundaries can play a role during recrystallization the influence of low angle grain boundaries are usually not taken into account neither in experimental investigations nor in simulations of the recrystallization process.

In general, recrystallization models discriminate between three different types of grain boundaries: low angle grain boundaries which are immobile, random high angle grain boundaries which are mobile and sometimes also some special grain boundaries with a higher mobility than the random grain boundaries.

The aim of this study is to investigate the influence of mobile low angle grain boundaries on the microstructure and texture evolution during recrystallization of deformed Al single crystals by using a cellular automaton model.