Export citation

Export citation

Choose format for download:

Download Citation

    Predicting the location of shear band initiation in a metallic glass

    Z. Fan1, E. Ma1, and M. L. Falk1,2,*

    • 1Department of Materials Science and Engineering, Johns Hopkins University (JHU), Baltimore, Maryland 21218, USA
    • 2Department of Physics and Astronomy, Department of Mechanical Engineering, and Hopkins Extreme Materials Institute, Johns Hopkins University (JHU), Baltimore, Maryland 21218, USA

    • *mfalk@jhu.edu

    Phys. Rev. Materials 6, 065602 – Published 9 June, 2022

    DOI: https://doi.org/10.1103/PhysRevMaterials.6.065602

    Abstract

    We report atomistic simulation results which indicate that the location of shear banding in a metallic glass (MG) can be ascertained with reasonably high accuracy solely from the undeformed static structure. Correlation is observed between the location of the initiation of shear bands in a simulated MG and the initial distribution of the density of fertile sites (DFS) for stress-driven shear transformations identified a priori based on a deep learning model devised in our recent work [Fan and Ma, Nat. Commun. 12, 1506 (2021)]. In addition, we demonstrated that one can judge whether a glass is brittle or ductile solely based upon its initial DFS distribution. These validate that shear bands in MG arise from nonlinear instabilities and that the as-quenched glass structure contains inhomogeneities that influence these instabilities. In this paper, we also reveal an important subtlety regarding the nondeterministic nature of athermal quasistatic shear simulations.

    Physics Subject Headings (PhySH)

    Authorization Required

    We need you to provide your credentials before accessing this content.

    Supplemental Material (Subscription Required)

    References (Subscription Required)

    Outline

    Information

    Sign In to Your Journals Account

    Filter

    Filter

    Article Lookup

    Enter a citation