Universal structural parameter to quantitatively predict metallic glass properties

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

128 Scopus Citations
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Author(s)

  • Jun Ding
  • Yong-Qiang Cheng
  • Howard Sheng
  • Mark Asta
  • Evan Ma

Detail(s)

Original languageEnglish
Article number13733
Journal / PublicationNature Communications
Volume7
Online published12 Dec 2016
Publication statusPublished - 2016
Externally publishedYes

Link(s)

Abstract

Quantitatively correlating the amorphous structure in metallic glasses (MGs) with their physical properties has been a long-sought goal. Here we introduce flexibility volume' as a universal indicator, to bridge the structural state the MG is in with its properties, on both atomic and macroscopic levels. The flexibility volume combines static atomic volume with dynamics information via atomic vibrations that probe local configurational space and interaction between neighbouring atoms. We demonstrate that flexibility volume is a physically appropriate parameter that can quantitatively predict the shear modulus, which is at the heart of many key properties of MGs. Moreover, the new parameter correlates strongly with atomic packing topology, and also with the activation energy for thermally activated relaxation and the propensity for stress-driven shear transformations. These correlations are expected to be robust across a very wide range of MG compositions, processing conditions and length scales.

Research Area(s)

Citation Format(s)

Universal structural parameter to quantitatively predict metallic glass properties. / Ding, Jun; Cheng, Yong-Qiang; Sheng, Howard et al.
In: Nature Communications, Vol. 7, 13733, 2016.

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

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