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MM: Fachverband Metall- und Materialphysik

MM 57: Microstructure and Phase Transformations - transformation kinetics

MM 57.3: Vortrag

Donnerstag, 23. März 2017, 10:45–11:00, IFW B

Steady state structure of the moving faceted grain boundaries — •Sherri Hadian, Blazej Grabowski, and Jörg Neugebauer — Department for Computational Materials Design, Max-Planck-Institut fu*r Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Du*sseldorf, Germany

Migration of grain boundaries in metals plays an important role in the evolution of the microstructure. To gain insight on dynamics of grain boundaries in realistic materials, we have studied the motion of grain boundaries of general orientations. These boundaries have been observed to facet on different length scales. We have studied the finite facet length effects on the mobility of grain boundaries using MD simulations and analytical models. Grain boundaries were run under different driving forces at a wide range of forces/temperatures and their kinetics and mechanisms of motion were thoroughly investigated. The results imply that for high driving forces the steady state structure of the moving boundaries differs from their static equilibrium structure.