Regensburg 2022 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 10: Poster Session 1

MM 10.18: Poster

Monday, September 5, 2022, 18:00–20:00, P2

Comparison of Crack - Dislocation Interactions in fcc and bcc Metals — •Benedikt Eggle-Sievers and Erik Bitzek — Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf

The Interactions between Cracks and Dislocations are investigated by means of large scale atomistic simulations with EAM-potentials. Dislocations of different character and Burgers vector are placed in the vicinity of a strain-controlled crack, resulting either in an attraction or repulsion of the dislocation. In the former case further interations can be observed in the course of the simulation, e.g. dislocation emission or crossslipping of screw parts. Depencies on the stress state, the crack system, dislocation character and distance between dislocation and crack tip are investigated in fcc and bcc crystals. The results are discussed in the framework of resolved shear stresses acting on the dislocations in the near field of the crack tip and for different dislocations characteristics in fcc and bcc.