Contribution of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites

被引：681

作者：

Zhang, Z. ^{[1
]}

Chen, D. L. ^{[1
]}

机构：

[1] Ryerson Univ, Dept Mech & Ind Engn, Toronto, ON M5B 2K3, Canada

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 483-84卷 / 1-2 C期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

metal matrix nanocomposites; Orowan strengthening; load-bearing effect; enhanced dislocation density strengthening;

D O I：

10.1016/j.msea.2006.10.184

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The relative contribution of three strengthening factors in particulate-reinforced metal matrix nanocomposites (MMNCs), namely, load-bearing effect, enhanced dislocation density strengthening effect and Orowan strengthening effect, is evaluated. Orowan strengthening mechanism is found to play a significant role in MMNCs. The relative contribution of Orowan strengthening effect increases with decreasing size of nanoparticles. However, there exists a critical particle size below which the Orowan strengthening effect drops abruptly. The critical particle size, independent of the volume fraction of nanoparticles, is found to be about 5.44 times the magnitude of the Burgers vector of dislocations in the matrix. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：148 / 152

页数：5

共 23 条

[1] Structural characterisation and mechanical properties of nanocomposite Al-based alloys [J].

Audebert, F ;

Prima, F ;

Galano, M ;

Tomut, M ;

Warren, PJ ;

Stone, IC ;

Cantor, B .

MATERIALS TRANSACTIONS, 2002, 43 (08) :2017-2025

[2] Silicon carbide particle size effects in alumina-based nanocomposites [J].

Carroll, L ;

Sternitzke, M ;

Derby, B .

ACTA MATERIALIA, 1996, 44 (11) :4543-4552

[3]

CASTRO V, 2005, MAT SCI ENG A-STRUCT, V400, P345

[4] Immersed nano-sized Al dispersoids in an Al matrix: effects on the structural and mechanical properties by molecular dynamics simulations [J].

Chamati, H ;

Stoycheva, MS ;

Evangelakis, GA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (28) :5031-5042

[5] Structure and properties of diamond-like carbon nanocomposite films containing copper nanoparticles [J].

Chen, CC ;

Hong, FCN .

APPLIED SURFACE SCIENCE, 2005, 242 (3-4) :261-269

[6] A GENERALIZED LAW OF MIXTURES [J].

FAN, Z ;

TSAKIROPOULOS, P ;

MIODOWNIK, AP .

JOURNAL OF MATERIALS SCIENCE, 1994, 29 (01) :141-150

[7] Development of high performance magnesium nanocomposites using solidification processing route [J].

Hassan, SF ;

Gupta, M .

MATERIALS SCIENCE AND TECHNOLOGY, 2004, 20 (11) :1383-1388

[8] Fe-Cu two-phase nanocomposites: Application of a modified rule of mixtures [J].

He, L ;

Allard, LF ;

Ma, E .

SCRIPTA MATERIALIA, 2000, 42 (05) :517-523

[9] Bounds on the strength of a model nanocomposite [J].

Holtz, RL ;

Provenzano, V .

NANOSTRUCTURED MATERIALS, 1997, 8 (03) :289-300

[10] Compressive mechanical properties of Mg-Ti-C nanocomposite synthesised by mechanical milling [J].

Hwang, S ;

Nishimura, C ;

McCormick, PG .

SCRIPTA MATERIALIA, 2001, 44 (10) :2457-2462

← 1 2 3 →