Rejuvenation engineering in metallic glasses by complementary stress and structure modulation

Daniel Şopu, Florian Spieckermann, Xilei Bian, Simon Fellner, Jonathan Wright, Megan Cordill, Christoph Gammer, Gang Wang, Mihai Stoica, Jürgen Eckert

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

Residual stress engineering is widely used in the design of new advanced lightweight materials. For metallic glasses, attention has been given to structural changes and rejuvenation processes. High-energy scanning X-ray diffraction strain mapping reveals large elastic fluctuations in notched metallic glasses after deformation under triaxial compression. Microindentation hardness mapping hints at a competing hardening–softening mechanism after compression and reveals the complementary effects of stress and structure modulation. Transmission electron microscopy proves that structure modulation and elastic heterogeneity distribution under room temperature deformation are related to shear band formation. Molecular dynamics simulations provide an atomistic understanding of the confined deformation mechanism in notched metallic glasses and the related fluctuations in the elastic and plastic strains. Thus, future focus should be given to stress modulation and elastic heterogeneity, which, together with structure modulation, may allow the design of metallic glasses with enhanced ductility and strain-hardening ability.
OriginalspracheEnglisch
Aufsatznummer61
Seitenumfang9
FachzeitschriftNPG Asia Materials
Jahrgang2023
Ausgabenummer15
DOIs
PublikationsstatusVeröffentlicht - 24 Nov. 2023

Bibliographische Notiz

Funding Information:
The authors acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG) through Grant No. SO 1518/1-1, the European Research Council under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025), Austrian Science Fund (FWF): Y1236-N37, the China Scholarship Council (CSC, 201806220096), the National Natural Science Foundation of China (No. 52171159) and the Natural Science Foundation of Shanghai (No. 22ZR1422500). We acknowledge the European Synchrotron Radiation Facility (ESRF) for providing synchrotron radiation facilities, and we would like to thank Dr. Carlotta Giacobbe for assistance and support in using beamline ID11. Calculations for this research were conducted on the Lichtenberg high-performance computer of the Technische Universität Darmstadt.

Funding Information:
The authors acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG) through Grant No. SO 1518/1-1, the European Research Council under the ERC Advanced Grant INTELHYB (grant ERC-2013-ADG-340025), Austrian Science Fund (FWF): Y1236-N37, the China Scholarship Council (CSC, 201806220096), the National Natural Science Foundation of China (No. 52171159) and the Natural Science Foundation of Shanghai (No. 22ZR1422500). We acknowledge the European Synchrotron Radiation Facility (ESRF) for providing synchrotron radiation facilities, and we would like to thank Dr. Carlotta Giacobbe for assistance and support in using beamline ID11. Calculations for this research were conducted on the Lichtenberg high-performance computer of the Technische Universität Darmstadt.

Publisher Copyright:
© 2023, The Author(s).

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