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

被引：129

作者：

Dou, R. ^{[1
]}

Derby, B. ^{[1
]}

机构：

[1] Univ Manchester, Sch Mat, Ctr Mat Sci, Manchester M1 7HS, Lancs, England

来源：

SCRIPTA MATERIALIA | 2009年 / 61卷 / 05期

关键词：

Nanocrystalline materials; Plastic deformation; Size effect; MECHANICAL-PROPERTIES; NANOPOROUS GOLD; YIELD STRENGTH; SINGLE-CRYSTAL; MICRO-PILLARS; DEFORMATION; COMPRESSION; PLASTICITY; COPPER; WHISKERS;

D O I：

10.1016/j.scriptamat.2009.05.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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), sigma(rss), scaled by shear modulus, p, and the diameter, d, scaled by Burgers vector, b, shows the following universal correlation: sigma(rss)/mu = 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. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：524 / 527

页数：4

共 34 条

[1] SLIP AND TWINNING IN HIGH-STRESS-DEFORMED GAAS AND THE INFLUENCE OF DOPING [J].

ANDROUSSI, Y ;

VANDERSCHAEVE, G ;

LEFEBVRE, A .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1989, 59 (06) :1189-1204

[2] Strength differences arising from homogeneous versus heterogeneous dislocation nucleation [J].

Bei, H. ;

Gao, Y. F. ;

Shim, S. ;

George, E. P. ;

Pharr, G. M. .

PHYSICAL REVIEW B, 2008, 77 (06)

[3] Effects of pre-strain on the compressive stress-strain response of Mo-alloy single-crystal micropillars [J].

Bei, H. ;

Shim, S. ;

Pharr, G. M. ;

George, E. P. .

ACTA MATERIALIA, 2008, 56 (17) :4762-4770

[4] Compressive strengths of molybdenum alloy micro-pillars prepared using a new technique [J].

Bei, H. ;

Shim, S. ;

George, E. P. ;

Miller, M. K. ;

Herbert, E. G. ;

Pharr, G. M. .

SCRIPTA MATERIALIA, 2007, 57 (05) :397-400

[5] Nanoporous Au: A high yield strength material [J].

Biener, J ;

Hodge, AM ;

Hamza, AV ;

Hsiung, LM ;

Satcher, JH .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (02)

[6] TENSILE STRENGTH OF WHISKERS [J].

BRENNER, SS .

JOURNAL OF APPLIED PHYSICS, 1956, 27 (12) :1484-1491

[7] PLASTIC DEFORMATION OF COPPER AND SILVER WHISKERS [J].

BRENNER, SS .

JOURNAL OF APPLIED PHYSICS, 1957, 28 (09) :1023-1026

[8] Size-affected single-slip behavior of pure nickel microcrystals [J].

Dimiduk, DM ;

Uchic, MD ;

Parthasarathy, TA .

ACTA MATERIALIA, 2005, 53 (15) :4065-4077

[9] The strength of gold nanowire forests [J].

Dou, R. ;

Derby, B. .

SCRIPTA MATERIALIA, 2008, 59 (02) :151-154

[10]

EVERY A, 1992, LANDOLTBORNSTEIN N A, V29

← 1 2 3 4 →