From elastic excitations to macroscopic plasticity in metallic glasses

D. Şopu, X. Yuan, F. Moitzi, F. Spieckermann, X. Bian, J. Eckert

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

1 Zitat (Scopus)

Abstract

Shear transformation zone (STZ) remains the fundamental unit to explain plastic flow in metallic glasses (MGs). Although STZs have been known and characterized for decades now the morphological and dynamical characteristics of STZs are not fully understood yet. Here, simulating athermal quasistatic shearing processes, the atomic-level mechanisms underlying elastic and plastic deformation in MGs are disclosed. Given the highly heterogeneous nature of glassy materials and the related rugged energy landscape the activation of STZs is observed from an early level of elastic deformation until the final shearing stage. The STZs identified within the elastic and plastic ranges have similar fingerprints but different magnitude and dynamics. Long-range overlapping STZ fields constrain atomic rearrangements and limit quantifying structure-dynamics correlations that explains the difficulty in establishing an ideal structure-property relationships for MGs.
OriginalspracheEnglisch
Aufsatznummer100958
FachzeitschriftApplied materials today
Jahrgang22.2021
AusgabenummerMarch
Frühes Online-Datum4 Feb. 2021
DOIs
PublikationsstatusVeröffentlicht - März 2021

Bibliographische Notiz

Funding Information:
The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG) through Grant no. SO 1518/1-1 and European Research Council under the ERC Proof of Concept Grant TriboMetGlass (grant ERC-2019-PoC-862485) and under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025). The authors are grateful for the computing time granted by the Lichtenberg high performance computer of Technische Universit?t Darmstadt.

Funding Information:
The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG) through Grant no. SO 1518/1-1 and European Research Council under the ERC Proof of Concept Grant TriboMetGlass (grant ERC-2019-PoC-862485 ) and under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025). The authors are grateful for the computing time granted by the Lichtenberg high performance computer of Technische Universität Darmstadt.

Publisher Copyright:
© 2021 The Authors

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