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

Journal Article · Mon Jun 07 00:00:00 EDT 2004 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2004.02.035· OSTI ID:20634698

San Marchi, C; Despois, J -F; Mortensen, A

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.

• OSTI ID: 20634698
• Journal Information: Acta Materialia, Vol. 52, Issue 10; Other Information: DOI: 10.1016/j.actamat.2004.02.035; PII: S1359645404001259; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
DAMAGE
DEFORMATION
DUCTILITY
ELASTICITY
FLEXIBILITY
FOAMS
FRACTURES
STRAINS