Correlating local structure with inhomogeneous elastic deformation in a metallic glass

J. Ding; Y. Q. Cheng; E. Ma

doi:10.1063/1.4754121

Correlating local structure with inhomogeneous elastic deformation in a metallic glass

J. Ding, Y. Q. Cheng, E. Ma

Chemical Spectroscopy

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Abstract

The elastic response of metallic glasses (MGs) is inhomogeneous, due to the wide variation of local structural arrangements. Here, we present molecular dynamics simulations on a one-million-atoms sample of a Cu ₆₄Zr ₃₆ model MG, correlating the atomic strain and non-affine displacement with short-range order. Cu atoms in full icosahedra experience less atomic relaxation and behave stiffer, while the rest of Cu atoms contribute more to anelasticity on the timescale of simulation.

Original language	English
Article number	121917
Journal	Applied Physics Letters
Volume	101
Issue number	12
DOIs	https://doi.org/10.1063/1.4754121
State	Published - Sep 17 2012

Funding

This work was supported by the U.S. National Science Foundation, Division of Materials Research, under Contract No. NSF-DMR-0904188. Y.Q.C. was supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.

Funders	Funder number
Scientific User Facilities Division
National Science Foundation
U.S. Department of Energy
Division of Materials Research	NSF-DMR-0904188
Basic Energy Sciences

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abstract = "The elastic response of metallic glasses (MGs) is inhomogeneous, due to the wide variation of local structural arrangements. Here, we present molecular dynamics simulations on a one-million-atoms sample of a Cu 64Zr 36 model MG, correlating the atomic strain and non-affine displacement with short-range order. Cu atoms in full icosahedra experience less atomic relaxation and behave stiffer, while the rest of Cu atoms contribute more to anelasticity on the timescale of simulation.",

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Correlating local structure with inhomogeneous elastic deformation in a metallic glass

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