Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 25: Topical session: Interface-Controlled Microstructures: Mechanical Properties and Mechano-Chemical Coupling - Structure and Deformation I

MM 25.4: Vortrag

Dienstag, 21. März 2017, 11:15–11:30, BAR 205

Coupled grain boundary motion driven by elastic anisotropy in FCC Cu — •Christian Brandl — Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe, Germany

Shear-coupled grain boundary motion is one mechanism, where the plastic shear deformation is linked to the microstructure changes by grain growth at low homologous temperatures. The prevailing notion on the driving force on the coupled grain boundary exclusively ascribes a shear stress in the grain boundary as the driving force. Here, we present molecular dynamics simulation to demonstrate coupled grain boundary driving by elastic anisotropy for a general large-angle asymmetry grain boundary in copper. The observed mechanisms is discussed in the framework of general driving forces of interface motion as the reduction of the total free energy grain linked to the defect migration.