• Letter

Towards commonality between shear banding and glass-liquid transition in metallic glasses

Zeng-Yu Yang and Lan-Hong Dai
Phys. Rev. Materials 6, L100602 – Published 26 October 2022
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Abstract

Despite the high attendance of shear banding in metallic glasses and other disordered materials, the nature of the emergence of shear band is still mysterious. Using molecular dynamics simulations, a set of detailed characterizations of shear band in a typical Cu50Zr50 metallic glass is obtained. Then we uncover a large number of robust and intriguing commonalities between the emergence of shear bands and the glass-to-liquid transition, including strong similarities on viscosity drop, enthalpy discontinuity, breakdown of hard backbone network, as well as relaxation process. Such observations indicate that shear banding in metallic glasses is a consequence of deformation-controlled glass transition, as further quantitatively validated via the compelling overlap between the venerable Vogel-Fulcher-Tammann law (and Adam-Gibbs relation) and the evolving glass state of shear band controlled by configurational temperature. These results provide a direct bridge between shear banding and glass-to-liquid transition and are instrumental to build the unified framework of flow behavior induced either by thermal or stressed stimuli in disordered materials.

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  • Received 25 July 2022
  • Revised 5 October 2022
  • Accepted 12 October 2022

DOI:https://doi.org/10.1103/PhysRevMaterials.6.L100602

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Zeng-Yu Yang1,2 and Lan-Hong Dai1,2,3,*

  • 1State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
  • 2School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China

  • *lhdai@lnm.imech.ac.cn

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Issue

Vol. 6, Iss. 10 — October 2022

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