Correlations of multiscale structural evolution and homogeneous flows in metallic glass ribbons

Jiacheng Ge, Peng Luo, Zhenduo Wu*, Wentao Zhang, Sinan Liu, Si Lan*, Jonathan D. Almer, Yang Ren, Xun-Li Wang, Weihua Wang

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

7 Citations (Scopus)
58 Downloads (CityUHK Scholars)

Abstract

Studying the flow behavior is critical to understand the deformation mechanism of amorphous solids. However, detecting the basic flow events in amorphous solids is challenging. Here, by simultaneous SAXS/WAXS, elementary flow carriers in wound metallic glasses are identified from flow-induced structural heterogeneities with a radius of gyration of 2.5∼3.5 nm. Their size increases and morphology changes from sphere-like to rod-like under flow. Moreover, the atomic structure exhibits an unusual change to a more disordered state during winding/annealing at the temperature of ∼0.8 Tg. This work provides an atomic-to-nanoscale description of the flow carriers of amorphous solids during deformation. Impact Statement The elementary flow carriers in metallic glasses have a radius of gyration of 2.5∼3.5 nm. During flow, their size increases and morphology changes from sphere-like to rod-like. © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Original languageEnglish
Pages (from-to)547-555
JournalMaterials Research Letters
Volume11
Issue number7
Online published11 Mar 2023
DOIs
Publication statusPublished - 2023

Research Keywords

  • flow units
  • Metallic glasses
  • SAXS/WAXS scattering

Publisher's Copyright Statement

  • This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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