Thermally activated nature of synchro-Shockley dislocations in Laves phases
Xie Z, Chauraud D, Atila A, Bitzek E, Korte-Kerzel S, Guénolé J (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 235
Article Number: 115588
DOI: 10.1016/j.scriptamat.2023.115588
Abstract
Synchro-Shockley dislocations, as zonal dislocation, are the major carrier of plasticity in Laves phases at high temperatures. The motion of synchro-Shockley dislocations is composed of localized transition events, such as kink-pair nucleation and propagation, which possess small activation volumes, presumably leading to sensitive temperature and strain rate dependence on the Peierls stress. However, the thermally activated nature of synchro-Shockley dislocation motion is not fully understood so far. In this study, the transition mechanisms of the motion of synchro-Shockley dislocations at different shear and normal strain levels are studied. The transition processes of dislocation motion can be divided into shear-sensitive and -insensitive events. The external shear strain lowers the energy barriers of shear-sensitive events. Thermal assistance is indispensable in activating shear-insensitive events, implying that the motion of synchro-Shockley dislocations is prohibited at low temperatures.
Authors with CRIS profile
Involved external institutions
Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen
Germany (DE)
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research
Germany (DE)
Université de Lorraine
France (FR)
Germany (DE)
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research
Germany (DE)
Université de Lorraine
France (FR)
How to cite
APA:
Xie, Z., Chauraud, D., Atila, A., Bitzek, E., Korte-Kerzel, S., & Guénolé, J. (2023). Thermally activated nature of synchro-Shockley dislocations in Laves phases. Scripta Materialia, 235. https://dx.doi.org/10.1016/j.scriptamat.2023.115588
MLA:
Xie, Zhuocheng, et al. "Thermally activated nature of synchro-Shockley dislocations in Laves phases." Scripta Materialia 235 (2023).
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