On the critical thickness for non-localized to localized plastic flow transition in metallic glasses: A molecular dynamics study

Zhong, C and Zhang, H and Cao, QP and Wang, XD and Zhang, DX and Ramamurty, U and Jiang, JZ (2016) On the critical thickness for non-localized to localized plastic flow transition in metallic glasses: A molecular dynamics study. In: SCRIPTA MATERIALIA, 114 . pp. 93-97.

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Abstract

Molecular dynamics simulations were employed to investigate the specimen thickness-dependent tensile behavior of a series of Cu(x)Z(100-x) (x = 20, 40, 50, 64 and 80 at%) metallic glass (MG) films, with a particular focus on the critical thickness, tc, below which non-localized plastic flow takes place. The simulation results reveal that while the transition occurs in all the alloys examined, t(c) is sensitive to the composition. We rationalize t(c) by postulating that the strain energy stored in the sample at the onset of plastic deformation has to be sufficient for the formation of shear bands. The composition-dependence of t(c) was found to correlate with the average activation energy of the atomic level plastic deformation events. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords:	Metallic glass; Molecular dynamic simulation; Mechanical; Behavior; Size effect
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	04 Mar 2016 07:36
Last Modified:	04 Mar 2016 07:36
URI:	http://eprints.iisc.ac.in/id/eprint/53344

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