Computer simulation of the strong surface effects on deformation behaviors of metallic glass nanowires

Guangping Zheng; H. Y. Zhang; J. H. Yang

doi:10.1016/j.scriptamat.2014.07.017

Computer simulation of the strong surface effects on deformation behaviors of metallic glass nanowires

Guangping Zheng, H. Y. Zhang, J. H. Yang

Research output: Journal article publication › Journal article › Academic research › peer-review

5 Citations (Scopus)

Abstract

Size effects on deformation behaviors of metallic glass (MG) nanowires are found to be associated with their surface imperfections from phase-field modeling. Necking instead of shear banding is the dominant deformation mode in MG nanowire with diameter d < 100 nm, suggesting that nucleation and growth of the flow defects at the nanowire surface could be the deformation mechanism. The surface effect manifests itself by the finite-size scaling for the fracture strength and the critical intrinsic surface defect density.

Original language	English
Pages (from-to)	57-60
Number of pages	4
Journal	Scripta Materialia
Volume	90
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2014.07.017
Publication status	Published - 1 Jan 2014

Keywords

Fracture
Hall-Petch effect
Metallic glass
Phase-field model
Shear bands

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1016/j.scriptamat.2014.07.017

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N2 - Size effects on deformation behaviors of metallic glass (MG) nanowires are found to be associated with their surface imperfections from phase-field modeling. Necking instead of shear banding is the dominant deformation mode in MG nanowire with diameter d < 100 nm, suggesting that nucleation and growth of the flow defects at the nanowire surface could be the deformation mechanism. The surface effect manifests itself by the finite-size scaling for the fracture strength and the critical intrinsic surface defect density.

AB - Size effects on deformation behaviors of metallic glass (MG) nanowires are found to be associated with their surface imperfections from phase-field modeling. Necking instead of shear banding is the dominant deformation mode in MG nanowire with diameter d < 100 nm, suggesting that nucleation and growth of the flow defects at the nanowire surface could be the deformation mechanism. The surface effect manifests itself by the finite-size scaling for the fracture strength and the critical intrinsic surface defect density.

KW - Fracture

KW - Hall-Petch effect

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KW - Phase-field model

KW - Shear bands

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DO - 10.1016/j.scriptamat.2014.07.017

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ER -

Computer simulation of the strong surface effects on deformation behaviors of metallic glass nanowires

Abstract

Keywords

ASJC Scopus subject areas

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