Effects of Macroscopic Pores on the Damping Behavior of Zn-Al Eutectoid Alloy

Abstract:

The objective of present work is to investigate the effect of macroscopic pores on the damping behavior of Zn-Al eutectoid alloy. The damping behavior of the foamed Zn-Al (FZA) eutectoid alloy prepared by air pressure infiltration process with macroscopic pores is characterized by internal friction (IF). Macroscopic pores size are on the order of a millimetre (0.51.0mm). The IF was measured on a multifunction internal friction apparatus (MFIFA) at frequencies of 0.5, 1.0 and 3.0 Hz over the temperature range of 25 to 400°C, while continuously heating temperature. The damping capacity of the FZA eutectoid alloy, with two different porosity and sizes of macroscopic pores, were compared with that of bulk Zn-Al eutectoid alloy specimen. The damping capacity of the materials is shown to increase with introducing macroscopic pores. Finally, the operative damping mechanisms in the FZA eutectoid alloy were discussed in light of IF measurements.

• Periodical: Applied Mechanics and Materials (Volumes 182-183)
• Pages: 213-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.182-183.213
• Online since: June 2012
• Authors: J.N. Wei, X.B. Chao, T.C. Huang, L.S. Yu, J.S. Zou, W.J. Xie
• Keywords: Damping, Internal Friction, Macroscopic Pores, Zn-Al Eutectoid Alloy

References

[1] M. Taya, Mater. Trans. JIM 32, 1 (1991).

[2] J.N. Wei, D.Y. Wang, W.J. Xie, J.L. Luo, F.S. Han, Physics Letters A 366, 134 (2007).

[3] J.N. Wei, Z.B. Li, F.S. Han, Physica Status Solidi a 191, 435 (2002).

[4] J.N. Wei, Y.L. Li, S.H. Song, Physica Status Solidi a 201, 923 (2004).

[5] J. Banhart, J. Baumeister, M. Weber, Mater. Sci. Eng. A 205, 221 (1996).

[6] J.N. Wei, Z.B. Li, F.S. Han, Physica Status Solidi a 191, 125 (2002).