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MM: Fachverband Metall- und Materialphysik

MM 58: Topical Session: Fundamentals of Fracture - Fatigue Fracture

MM 58.1: Topical Talk

Thursday, March 14, 2013, 15:45–16:15, H4

Nucleation and interaction of cracks at and with interfaces — •Horst Vehoff — Institut für Werkstoffwissenschaft, Universität des Saarlande, Saarbrücken

Fatigue and crack growth tests on nano and macro sized bi- and polycrystals are presented. The focus of the experiments lies on the interaction of cracks with defined interfaces as well as on the effect of grain size on crack growth especially in bimodal microstructures of the nano - ufg type. Special techniques like 3D- tomography, EBSD, OGM and STEM are used to characterize the cracks. The results are discussed in the view of recent crack growth models.