Atomistic deformation mechanisms in twinned copper nanospheres

Jianjun Bian; Xinrui Niu; Hao Zhang; Gangfeng Wang

doi:10.1186/1556-276X-9-335

Atomistic deformation mechanisms in twinned copper nanospheres

Jianjun Bian, Xinrui Niu, Hao Zhang, Gangfeng Wang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

10 Citations (Scopus)

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Abstract

In the present study, we perform molecular dynamic simulations to investigate the compression response and atomistic deformation mechanisms of twinned nanospheres. The relationship between load and compression depth is calculated for various twin spacing and loading directions. Then, the overall elastic properties and the underlying plastic deformation mechanisms are illuminated. Twin boundaries (TBs) act as obstacles to dislocation motion and lead to strengthening. As the loading direction varies, the plastic deformation transfers from dislocations intersecting with TBs, slipping parallel to TBs, and then to being restrained by TBs. The strengthening of TBs depends strongly on the twin spacing. © 2014 Bian et al.; licensee Springer.

Original language	English
Pages (from-to)	1-7
Journal	Nanoscale Research Letters
Volume	9
Issue number	1
DOIs	https://doi.org/10.1186/1556-276X-9-335
Publication status	Published - 2014

Research Keywords

Nanosphere
Strengthening
Twin boundary

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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TY - JOUR

T1 - Atomistic deformation mechanisms in twinned copper nanospheres

AU - Bian, Jianjun

AU - Niu, Xinrui

AU - Zhang, Hao

AU - Wang, Gangfeng

PY - 2014

Y1 - 2014

N2 - In the present study, we perform molecular dynamic simulations to investigate the compression response and atomistic deformation mechanisms of twinned nanospheres. The relationship between load and compression depth is calculated for various twin spacing and loading directions. Then, the overall elastic properties and the underlying plastic deformation mechanisms are illuminated. Twin boundaries (TBs) act as obstacles to dislocation motion and lead to strengthening. As the loading direction varies, the plastic deformation transfers from dislocations intersecting with TBs, slipping parallel to TBs, and then to being restrained by TBs. The strengthening of TBs depends strongly on the twin spacing. © 2014 Bian et al.; licensee Springer.

AB - In the present study, we perform molecular dynamic simulations to investigate the compression response and atomistic deformation mechanisms of twinned nanospheres. The relationship between load and compression depth is calculated for various twin spacing and loading directions. Then, the overall elastic properties and the underlying plastic deformation mechanisms are illuminated. Twin boundaries (TBs) act as obstacles to dislocation motion and lead to strengthening. As the loading direction varies, the plastic deformation transfers from dislocations intersecting with TBs, slipping parallel to TBs, and then to being restrained by TBs. The strengthening of TBs depends strongly on the twin spacing. © 2014 Bian et al.; licensee Springer.

KW - Nanosphere

KW - Strengthening

KW - Twin boundary

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DO - 10.1186/1556-276X-9-335

M3 - RGC 21 - Publication in refereed journal

C2 - 25024693

SN - 1931-7573

VL - 9

SP - 1

EP - 7

JO - Nanoscale Research Letters

JF - Nanoscale Research Letters

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ER -

Atomistic deformation mechanisms in twinned copper nanospheres

Abstract

Research Keywords

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