Deformation in metallic glasses studied by synchrotron x-ray diffraction

Dmowski, Wojciech; Egami, Takeshi; Tong, Yang

doi:10.3390/met6010022

Title: Deformation in metallic glasses studied by synchrotron x-ray diffraction

Journal Article · Mon Jan 11 00:00:00 EST 2016 · Metals

DOI:https://doi.org/10.3390/met6010022· OSTI ID:1236599

Dmowski, Wojciech ^[1]; Egami, Takeshi ^[2]; Tong, Yang ^[3]

University of Tennessee, Knoxville, TN (United States)
University of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
University of Tennessee, Knoxville, TN (United States); City Univ. of Hong Kong, Hong Kong (China)

In this study, high mechanical strength is one of the superior properties of metallic glasses which render them promising as a structural material. However, understanding the process of mechanical deformation in strongly disordered matter, such as metallic glass, is exceedingly difficult because even an effort to describe the structure qualitatively is hampered by the absence of crystalline periodicity. In spite of such challenges, we demonstrate that high-energy synchrotron X-ray diffraction measurement under stress, using a two-dimensional detector coupled with the anisotropic pair-density function (PDF) analysis, has greatly facilitated the effort of unraveling complex atomic rearrangements involved in the elastic, anelastic, and plastic deformation of metallic glasses. Even though PDF only provides information on the correlation between two atoms and not on many-body correlations, which are often necessary in elucidating various properties, by using stress as means of exciting the system we can garner rich information on the nature of the atomic structure and local atomic rearrangements during deformation in glasses.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1236599

Journal Information:: Metals, Vol. 6, Issue 1; ISSN 2075-4701

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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References (24)

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Time-of-flight neutron total scattering with applied electric fields: Ex situ and in situ studies of ferroelectric materials Usher, Tedi-Marie; Forrester, Jennifer S.; McDonnell, Marshall Review of Scientific Instruments, Vol. 89, Issue 9 https://doi.org/10.1063/1.5037609	journal	September 2018

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