Uniaxial deformation of open-cell aluminum foam: the role of internal damage

被引：97

作者：

San Marchi, C ^{[1
]}

Despois, JF ^{[1
]}

Mortensen, A ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Mat, Lab Mech Met, CH-1015 Lausanne, Switzerland

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 10期

关键词：

foams; mechanical properties; elastic behavior; ductility; aluminum; damage;

D O I：

10.1016/j.actamat.2004.02.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Internal damage accumulation is measured and shown to play a role in the mechanical response of replicated pure Al and Al-12Si open-cell foams. This internal damage is quantified by measuring the reduction in the foam's stiffness with strain. The brittle Si second phase fractures during deformation of Al-12Si foam, resulting in damage accumulation rates an order of magnitude greater than for pure Al foam. Elementary damage mechanics is used to relate the measured rate of damage accumulation to the foam's tensile failure strain. The analysis and experimental results highlight in particular the strong embrittling influence of brittle second phases within the foam, such as Si. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2895 / 2902

页数：8

共 28 条

[1] Compressive and tensile behaviour of aluminum foams [J].