Damping Behaviors of the Commercially Pure Al Prepared by ECAP


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Experiments have been carried out to investigate the damping behaviors of commercially pure aluminum (L2) prepared by equal-channel angular pressing (ECAP). The damping characterization was conducted on a DMTA-V apparatus. The internal friction was measured at frequencies of 0.1, 0.3, 1.0, 4.0 and 8.0 Hz over the temperature range of 20~150°C. The measured damping capacity shows that ultra-fine grained structure pure Al (L2) prepared by ECAP has a damping capacity that is enhanced in comparison with coarse one, especially when the temperature is higher than 60°C. The dependence of the damping capacity at room temperature on the strain amplitude shows a nonlinear characteristic, and increases rapidly with the strain amplitude (0) when 0 is comparatively low. While the strain amplitude is higher than certain value, the damping capacity will become saturated slowly. The high damping capacity of the pure Al prepared by ECAP was attributed to the high density of dislocations and ultra-fine grained structure.



Edited by:

N. Igata and S. Takeuchi




J. C. Wang et al., "Damping Behaviors of the Commercially Pure Al Prepared by ECAP", Key Engineering Materials, Vol. 319, pp. 109-114, 2006

Online since:

September 2006




[1] J. Zhang, R. J. Perez, C. R. Wong, E. J. Lavernia: Materials Science and Engineering R13 (1994) p.325.

[2] P.A. Zinoviev, Y. N. Ermakov: Energy dissipation in composite materials (Technomic Publishing Company Inc, 1994).

[3] Y. Koizumi, M. Ueyama, N. Tsuji, Y. Minamino , K. Ota: Journal of Alloys and Compounds 355 (2003) p.47.

[4] R.Z. Valiev, R.K. Islamgaliev, I.V. Alexandrov: Progress in Materials Science 2000, (45) p.103.

[5] V.M. Segal: Materials Science and Engineering A 386 (2004) p.269.

[6] R. R. Mulyukov, N.A. Akhmadeev: Materials Science and Engineering A171 (1993) p.143.

[7] R. R. Mulyukov, M. Weller, R. Valiev, Th. Gessmann, H. -E. Schaefer: Nanostructured Materials 6 (1995) p.577.

DOI: https://doi.org/10.1016/0965-9773(95)00124-7

[8] R.R. Mulyukov, A.I. Pshenichnyuk: Journal of Alloys and Compounds 355 (2003) p.26.

[9] V.N. Chuvildeev, T.G. Nieh, M. Yu. Gryaznov, A. N. Sysoev V. I. Kopylov: Scripta Materialia 50 (2004) p.861.

[10] V.N. Chuvildeev, T.G. Nieh, M. Yu. Gryaznov, V.I. Kopylov, A.N. Sysoev: Journal of Alloys and Compounds 378 (2004) p.253.

[11] Y. Iwahashi, Z. Horita, M. Nemoto T.G. Langon, Acta Materiala 45 (1997) p.4733.

[12] Z. Horita, T. Fujinami, M. Nemoto, T.G. Langdon: Journal of Materials Processing Technology 117 (2001) P. 288.

[13] P.C. Hung, P.L. Sun, C.Y. Yu, P.W. Kao, C.P. Chang: Scripta Materialia 53 (2005) p.647.

[14] T.S. Kê : Theory of Internal Friction In Solids (Scientific Press, China, 2000).

[15] A. Granato, K. Lucke: J. Appl. Phys. 27 (1956) p.583.