Rate-dependent behavior of hierarchical Al matrix composites

被引：23

作者：

Zhang, H. ^{[1
]}

Ye, J. ^{[2
]}

Joshi, S. P. ^{[1
]}

Schoenung, J. M. ^{[2
]}

Chin, E. S. C. ^{[3
]}

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

机构：

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

[2] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[3] USA, Res Lab, Weap & Mat Res Directorate, Aberdeen Proving Ground, MD 21005 USA

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 10期

关键词：

Hierarchical microstructure; Length-scale effects; Rate-dependent behavior; Metal matrix composite; Strain-to-failure;

D O I：

10.1016/j.scriptamat.2008.07.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present the rate-dependent constitutive response of hierarchical Al matrix composites which comprise a bi-modal distribution of Al in fine (nanocrystalline Al containing micro-sized B4C particles) and coarse (micro-grained Al) grain regimes. The strength of these composites is improved by various strengthening mechanisms. Shear localization is observed to be the primary failure mode. Compared to quaistatic loading, significant increase of strain to failure is observed at high strain rates. Varying rate-sensitivity is observed with different amount of B4C particles. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1139 / 1142

页数：4

共 15 条

[1]

BENCK RF, 1975, 2480 US BALL RES LAB

[2] 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

[3] Optimization of strength and ductility in nanocrystalline and ultrafine grained metals [J].

Koch, CC .

SCRIPTA MATERIALIA, 2003, 49 (07) :657-662

[4]

Kolsky H., 1949, Proceedings of the Physical Society. Section B, V62, P676, DOI DOI 10.1088/0370-1301/62/11/302

[5] Viscoplastic deformations and compressive damage in an A359/SiCp metal-matrix composite [J].

Li, Y ;

Ramesh, KT ;

Chin, ESC .

ACTA MATERIALIA, 2000, 48 (07) :1563-1573

[6] Instabilities and ductility of nanocrystalline and ultrafine-grained metals [J].

Ma, E .

SCRIPTA MATERIALIA, 2003, 49 (07) :663-668

[7]

Schoenung J.M., 2005, Mater. Forum, V29, P123

[8]

VOIGT W, 1889, WIED ANN, V38, P573

[9] Influences of strain rate and grain size on yield and serrated flow in commercial Al-Mg alloy 5086 [J].

Wagenhofer, M ;

Erickson-Natishan, M ;

Armstrong, RW ;

Zerilli, FJ .

SCRIPTA MATERIALIA, 1999, 41 (11) :1177-1184

[10] High tensile ductility in a nanostructured metal [J].

Wang, YM ;

Chen, MW ;

Zhou, FH ;

Ma, E .

NATURE, 2002, 419 (6910) :912-915

← 1 2 →