Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 5: Liquid and Amorphous Metals - Kinetics and Modelling
MM 5.4: Vortrag
Montag, 16. März 2020, 11:00–11:15, IFW D
Micro-second molecular dynamics --- structural relaxation and mechanical properties of a model glass system — •Peter Derlet1 and Robert Maass2 — 1Condensed Matter Theory Group, Paul Scherrer Institute, Switzerland — 2Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, USA
Using molecular dynamics, we study the structural relaxation of a model binary Lennard-Jones glass over time scales spanning up to several tens of microseconds. These well-relaxed samples are then deformed to study the elastic and collective plastic shear activity under simple shear for a range of strain rates spanning six orders of magnitude. It is found that at the longer time-scales of deformation, significant thermally activated mobility and relaxation occurs in both the elastic and plastic deformation regimes. These results are discussed in terms of both the known elastic robustness of bulk metallic glasses, and the correlation between local structure and local plasticity.