Characterization of close-celled cellular aluminum alloys

The deformation behaviour of two different types of aluminium alloy foam are studied under tension, compression, shear and hydrostatic pressure. Foams having closed cells are processed via batch casting, whereas foams with semi-open cells are processed by negative pressure infiltration. The influenc...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2001-06, Vol.36 (11), p.2773-2786
Main Authors: LU, T. J, ONG, J. M
Format: Article
Language:English
Subjects:
Aluminum base alloys
Anisotropy
Applied sciences
Constitutive models
Deformation analysis
Deformation mechanisms
Density
Dependence
Elasticity. Plasticity
Exact sciences and technology
Foamed metals
Hydrostatic pressure
Materials science
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Pressure casting
Stiffness
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The deformation behaviour of two different types of aluminium alloy foam are studied under tension, compression, shear and hydrostatic pressure. Foams having closed cells are processed via batch casting, whereas foams with semi-open cells are processed by negative pressure infiltration. The influence of relative foam density, cell structure and cell orientation on the stiffness and strength of foams is studied; the deformation mechanisms are analysed by using video imaging and SEM (scanning electronic microscope). The measured dependence of stiffness and strength upon relative foam density are compared with analytical predictions. The measured stress versus strain curves along different loading paths are compared with predictions from a phenomenological constitutive model. It is found that the deformations of both types of foams are dominated by cell wall bending, attributed to various process induced imperfections in the cellualr structure. The closed cell foam is found to be isotropic, whereas the semi-open cell foam shows strong anisotropy.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1017977216346