SKM 2023 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MM: Fachverband Metall- und Materialphysik
MM 41: Topical Session: Defect Phases III
MM 41.5: Talk
Thursday, March 30, 2023, 17:15–17:30, SCH A 216
Unveiling the mechanisms of motion of synchro-Shockley dislocations in Laves phases — •Zhuocheng Xie1, Dimitri Chauraud2, Achraf Atila2,3, Erik Bitzek2,3, Sandra Korte-Kerzel1, and Julien Guénolé4,5 — 1Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, 52056 Aachen, Germany — 2Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany — 3Department of Materials Science and Engineering, Institute I: General Materials Properties, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 4Université de Lorraine, CNRS, Arts et Métiers ParisTech, LEM3, 57070 Metz, France — 5Labex Damas, Université de Lorraine, 57070 Metz, France
Synchroshear as the dominant basal slip mechanism in Laves phases is accomplished by the glide of synchro-Shockley dislocations. However, the mechanism of synchro-Shockley dislocation motion is still not well understood. In this work, we demonstrate kink propagation as the energetically favorable mechanism for the motion of synchro-Shockley dislocation using atomistic simulations. Vacancy hopping and interstitial shuffling are identified as two key mechanisms of kink propagation. The assistance of vacancy and antisite defects on kink nucleation and propagation are investigated and shown crucial for kink mobility. These findings provide insights into the dependency on temperature and chemical composition of plastic deformation of topologically close-packed phases.