Strengthening mechanisms in cryomilled ultrafine-grained aluminum alloy at quasi-static and dynamic rates of loading

被引：58

作者：

Cao, Buyang ^{[1
]}

Joshi, Shailendra P. ^{[2
]}

Ramesh, K. T. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA

[2] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 08期

关键词：

Ultrafine grained microstructure; Dynamic mechanical analysis; Strengthening; Precipitation; AL-MG ALLOYS; STRAIN-RATE; DEFORMATION; BEHAVIOR; NANOCRYSTALLINE; 5083-AL-ALLOYS; MICROSTRUCTURE; PRECIPITATION; FRACTURE; MATRIX;

D O I：

10.1016/j.scriptamat.2008.12.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To achieve lightweight and high-strength materials, Al alloy has been cryomilled and processed to obtain refined microstructures. The microstructure and strengthening mechanisms of the resulting ultrafine-grained material are investigated in this work. Contributions from the several mechanisms (boundary strengthening, solid solution strengthening, precipitate strengthening and dislocation strengthening) are discussed and estimated using simplified models. Comparison with experimental data suggests some directions for materials design. (C) 2008 Acta Mateialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：619 / 622

页数：4

共 31 条

[1]

Armstrong R.W., 1967, DISLOCATION DYNAMICS, P293

[2] ON GENERATION OF DISLOCATIONS AT MISFITTING PARTICLES IN A DUCTILE MATRIX [J].

ASHBY, MF ;

JOHNSON, L .

PHILOSOPHICAL MAGAZINE, 1969, 20 (167) :1009-&

[3] DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS [J].

ASHBY, MF .

PHILOSOPHICAL MAGAZINE, 1970, 21 (170) :399-&

[4]

Courtney Thomas., 2000, MECH BEHAV MAT

[5] Size-dependent inelastic behavior of particle-reinforced metal-matrix composites [J].

Dai, LH ;

Ling, Z ;

Bai, YL .

COMPOSITES SCIENCE AND TECHNOLOGY, 2001, 61 (08) :1057-1063

[6] Plastic deformation and fracture of ultrafine-grained Al-Mg alloys with a bimodal grain size distribution [J].

Fan, GJ ;

Choo, H ;

Liaw, PK ;

Lavernia, EJ .

ACTA MATERIALIA, 2006, 54 (07) :1759-1766

[7] Strain rate dependence of properties of cryomilled bimodal 5083 Al alloys [J].

Han, B. Q. ;

Huang, J. Y. ;

Zhu, Y. T. ;

Lavernia, E. J. .

ACTA MATERIALIA, 2006, 54 (11) :3015-3024

[8] Effect of strain rate on the ductility of a nanostructured aluminum alloy [J].

Han, BQ ;

Huang, JY ;

Zhu, YT ;

Lavernia, EJ .

SCRIPTA MATERIALIA, 2006, 54 (06) :1175-1180

[9] Deformation behavior of bimodal nanostructured 5083 Al alloys [J].

Han, BQ ;

Lee, Z ;

Witkin, D ;

Nutt, S ;

Lavernia, EJ .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (04) :957-965

[10] Mechanical properties of an ultrafine-grained Al-7.5 pct Mg alloy [J].

Han, BQ ;

Lee, Z ;

Nutt, SR ;

Lavernia, EJ ;

Mohamed, FA .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34 (03) :603-613

← 1 2 3 4 →