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Damping properties of open cell microcellular pure Al foams

Yang, Y., Han, F., Wen, Cui`e and Shu, Y. 2007, Damping properties of open cell microcellular pure Al foams, Materials science and technology, vol. 23, no. 11, pp. 1336-1340.

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Title Damping properties of open cell microcellular pure Al foams
Author(s) Yang, Y.
Han, F.
Wen, Cui`e
Shu, Y.
Journal name Materials science and technology
Volume number 23
Issue number 11
Start page 1336
End page 1340
Publisher Maney Publishing
Place of publication London, England
Publication date 2007-11
ISSN 1743-2847
Keyword(s) Al foam
damping properties
internal friction
sintering
Summary Damping behaviours of the open cell microcellular pure Al foams fabricated by sintering and dissolution process with the relative density of 0·31-0·42 and the pore size of 112-325 μm were investigated. The damping characterisation was conducted on a multifunction internal friction apparatus. The internal friction (IF) was measured at frequencies of 1·0, 3·0 and 6·0 Hz over the temperature range of 298-725 K. The measured IF shows that the open cell pure Al foam has a damping capacity that is enhanced in comparison with pure Al. At a lower temperature (∼400 K), the IF of the open cell pure Al foams increases with decreasing relative density, with decreasing pore size and with increasing frequency. The IF peak was found at the temperature range of 433-593 K in the IF curves. It is clear that the IF peak is relaxational type and the activation energy associated with the IF peak is about 1·60 ± 0·02 eV. Defect effects can be used to interpret the damping mechanisms.
Language eng
Field of Research 091099 Manufacturing Engineering not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Institute of Materials, Minerals and Mining
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007264

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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