Nonlinear internal friction character of foamed aluminum

Experiment and theory analysis have demonstrated that foamed aluminum (FA) has not only higher damping capacity over corresponding bulk Al, but has a nonlinear IF character which becomes more pronounced with decreasing the density and pore size of it. This amplitude-dependent damping might be ascrib...

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Bibliographic Details
Published in:Scripta materialia 1997-11, Vol.37 (9), p.1441-1447
Main Authors: Han, F-S, Zhu, Z-G, Liu, C-S
Format: Article
Language:English
Subjects:
Anelasticity, internal friction, stress relaxation, and mechanical resonances
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Metals. Metallurgy
Physics
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Summary:Experiment and theory analysis have demonstrated that foamed aluminum (FA) has not only higher damping capacity over corresponding bulk Al, but has a nonlinear IF character which becomes more pronounced with decreasing the density and pore size of it. This amplitude-dependent damping might be ascribed to higher density of vacancies generated in the foaming, and of dislocations around pore boundaries.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(97)00278-9