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Exploration of the defect’s effect on the mechanical properties of different orientated nanowires

Zhan, Haifei & Gu, YuanTong (2011) Exploration of the defect’s effect on the mechanical properties of different orientated nanowires. Advanced Materials Research, 328-30, pp. 1239-1244.

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Abstract

Molecular dynamics (MD) simulations have been carried out to investigate the defect’s effect on the mechanical properties of copper nanowire with different crystallographic orientations, under tensile deformation. Three different crystallographic orientations have been considered. The deformation mechanism has been carefully discussed. It is found that the Young’s modulus is insensitive to the defect, even when the nanowire’s crystallographic orientation is different. However, due to the defect’s effect, the yield strength and yield strain appear a large decrease. The defects have played a role of dislocation sources, the slips or stacking faults are first generated around the locations of the defects. The necking locations have also been affected by different defects. Due to the surface defect, the plastic deformation has received a large influence for the <001>/{110} and <110> orientated nanowires, and a relative small influence is seen for the <111> nanowire.

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ID Code: 42595
Item Type: Journal Article
Additional URLs:
Keywords: Defect, Deformation Mechanism, Molecular Dynamics (MD), Nanowire, Orientation
DOI: 10.4028/www.scientific.net/AMR.328-330.1239
ISSN: 1022-6680
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Materials Engineering not elsewhere classified (091299)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 Trans Tech Publications, Switzerland.
Deposited On: 13 Jul 2011 09:49
Last Modified: 12 Oct 2011 01:14

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