A universal scaling law for the strength of metal micropillars and nanowires

R. Dou; B. Derby

doi:10.1016/j.scriptamat.2009.05.012

A universal scaling law for the strength of metal micropillars and nanowires

R. Dou, B. Derby

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Abstract

The yield strength of sub-micron single-crystal metal pillars and wires increases with decreasing pillar diameter. Here, we show that the yield stress (resolved onto a slip system), σrss, scaled by shear modulus, μ, and the diameter, d, scaled by Burgers vector, b, shows the following universal correlation: σrss / μ = A (d / b)m; for face-centred cubic (fcc) metals A = 0.71 and m = -0.66. Data for Mo and a Mo alloy are found to approximately obey the fcc correlation, despite having a different crystal structure. © 2009 Acta Materialia Inc.

Original language	English
Pages (from-to)	524-527
Number of pages	3
Journal	Scripta Materialia
Volume	61
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2009.05.012
Publication status	Published - Sept 2009

Keywords

Nanocrystalline materials
Plastic deformation
Size effect

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10.1016/j.scriptamat.2009.05.012

POST-PEER-REVIEW-NON-PUBLISHERS-DOCUMENT.PDFAccepted author manuscript, 149 KB

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title = "A universal scaling law for the strength of metal micropillars and nanowires",

abstract = "The yield strength of sub-micron single-crystal metal pillars and wires increases with decreasing pillar diameter. Here, we show that the yield stress (resolved onto a slip system), σrss, scaled by shear modulus, μ, and the diameter, d, scaled by Burgers vector, b, shows the following universal correlation: σrss / μ = A (d / b)m; for face-centred cubic (fcc) metals A = 0.71 and m = -0.66. Data for Mo and a Mo alloy are found to approximately obey the fcc correlation, despite having a different crystal structure. {\textcopyright} 2009 Acta Materialia Inc.",

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AU - Dou, R.

AU - Derby, B.

N1 - Times Cited: 1 1359-6462

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Y1 - 2009/9

N2 - The yield strength of sub-micron single-crystal metal pillars and wires increases with decreasing pillar diameter. Here, we show that the yield stress (resolved onto a slip system), σrss, scaled by shear modulus, μ, and the diameter, d, scaled by Burgers vector, b, shows the following universal correlation: σrss / μ = A (d / b)m; for face-centred cubic (fcc) metals A = 0.71 and m = -0.66. Data for Mo and a Mo alloy are found to approximately obey the fcc correlation, despite having a different crystal structure. © 2009 Acta Materialia Inc.

AB - The yield strength of sub-micron single-crystal metal pillars and wires increases with decreasing pillar diameter. Here, we show that the yield stress (resolved onto a slip system), σrss, scaled by shear modulus, μ, and the diameter, d, scaled by Burgers vector, b, shows the following universal correlation: σrss / μ = A (d / b)m; for face-centred cubic (fcc) metals A = 0.71 and m = -0.66. Data for Mo and a Mo alloy are found to approximately obey the fcc correlation, despite having a different crystal structure. © 2009 Acta Materialia Inc.

KW - Nanocrystalline materials

KW - Plastic deformation

KW - Size effect

U2 - 10.1016/j.scriptamat.2009.05.012

DO - 10.1016/j.scriptamat.2009.05.012

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SP - 524

EP - 527

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

A universal scaling law for the strength of metal micropillars and nanowires

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Keywords

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