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M: Metallphysik

M 39: Mechanische Eigenschaften II

M 39.1: Talk

Tuesday, March 8, 2005, 11:30–11:45, TU H111

EFFECT OF MECHANICAL STRESS FIELDS ON RECRYSTALLIZATION OF AN Al-Mg ALLOY — •Carmen Schäfer and Myrjam Winning — Institut für Metallkunde und Metallphysik, RWTH Aachen. Kopernikusstr. 14, 52056 Aachen

The motion of grain boundaries is the key phenomenon of recrystallization and grain growth and dominates the evolution of texture and microstructure, i.e. the macroscopic physical and mechanical properties of a material, in particular of a part in service. Recently it could be experimentally shown that mechanical stresses can influence the dynamical behavior of individual, planar grain boundaries. From these results, we can conclude that there must be also effects of mechanical stress fields on the behavior of grain boundaries in polycrystalline materials. Consequently, the aim of this study was to demonstrate the effect of mechanical stresses on the recrystallization behavior of an Al-2