Yield strength in nanocrystalline Cu during high strain rate deformation

Nhon Q. Vo; Robert S. Averback; Pascal Bellon; Alfredo Caro

doi:10.1016/j.scriptamat.2009.03.003

Yield strength in nanocrystalline Cu during high strain rate deformation

Nhon Q. Vo, Robert S. Averback, Pascal Bellon, Alfredo Caro

Research output: Contribution to journal › Article › peer-review

Abstract

Molecular dynamics simulations are used to study the yield strength of thermally annealed nanocrystalline Cu samples. For strain rates of 1 × 10¹⁰ and 1 × 10⁹ s^-1, the observed yield strength scales with the fractional number of grain boundary (GB) atoms. This observation suggests a new scaling behavior for the onset of plasticity in nanocrystalline materials, controlled not by the grain size alone, but by a combination of both grain size and degree of GB relaxation, as measured by the GB volume.

Original language	English (US)
Pages (from-to)	76-79
Number of pages	4
Journal	Scripta Materialia
Volume	61
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2009.03.003
State	Published - Jul 2009

Keywords

Hall-Petch
Molecular dynamics
Nanocrystalline
Yield strength

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Online availability

10.1016/j.scriptamat.2009.03.003

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title = "Yield strength in nanocrystalline Cu during high strain rate deformation",

abstract = "Molecular dynamics simulations are used to study the yield strength of thermally annealed nanocrystalline Cu samples. For strain rates of 1 × 1010 and 1 × 109 s-1, the observed yield strength scales with the fractional number of grain boundary (GB) atoms. This observation suggests a new scaling behavior for the onset of plasticity in nanocrystalline materials, controlled not by the grain size alone, but by a combination of both grain size and degree of GB relaxation, as measured by the GB volume.",

keywords = "Hall-Petch, Molecular dynamics, Nanocrystalline, Yield strength",

author = "Vo, {Nhon Q.} and Averback, {Robert S.} and Pascal Bellon and Alfredo Caro",

note = "Funding Information: This work was supported by the US Department of Energy, Basic Energy Sciences under grant DEFG02-05ER46217, the US DOE National Nuclear Security Administration under grant DEFG52-06NA26153, and in part under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.",

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language = "English (US)",

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T1 - Yield strength in nanocrystalline Cu during high strain rate deformation

AU - Vo, Nhon Q.

AU - Averback, Robert S.

AU - Bellon, Pascal

AU - Caro, Alfredo

N1 - Funding Information: This work was supported by the US Department of Energy, Basic Energy Sciences under grant DEFG02-05ER46217, the US DOE National Nuclear Security Administration under grant DEFG52-06NA26153, and in part under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

PY - 2009/7

Y1 - 2009/7

N2 - Molecular dynamics simulations are used to study the yield strength of thermally annealed nanocrystalline Cu samples. For strain rates of 1 × 1010 and 1 × 109 s-1, the observed yield strength scales with the fractional number of grain boundary (GB) atoms. This observation suggests a new scaling behavior for the onset of plasticity in nanocrystalline materials, controlled not by the grain size alone, but by a combination of both grain size and degree of GB relaxation, as measured by the GB volume.

AB - Molecular dynamics simulations are used to study the yield strength of thermally annealed nanocrystalline Cu samples. For strain rates of 1 × 1010 and 1 × 109 s-1, the observed yield strength scales with the fractional number of grain boundary (GB) atoms. This observation suggests a new scaling behavior for the onset of plasticity in nanocrystalline materials, controlled not by the grain size alone, but by a combination of both grain size and degree of GB relaxation, as measured by the GB volume.

KW - Hall-Petch

KW - Molecular dynamics

KW - Nanocrystalline

KW - Yield strength

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Yield strength in nanocrystalline Cu during high strain rate deformation

Abstract

Keywords

ASJC Scopus subject areas

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