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Effects of macroscopic defects on the damping behavior of aluminum and Zn-27 Pct Al alloy

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Abstract

A study was carried out on the influence of macroscopic defects on the damping behavior of commercially pure Al and Zn-27 pct Al alloy. The macroscopic defects, pores, and graphite particulates with a size of 0.001±0.0005 m and volume fractions ranging from 19 to 94 pct were introduced into the structures by infiltration technology. It has been shown that pores or graphite particulates can improve the damping capacity of commercially pure Al, due to the interaction between macro- and microdefects. Pores, however, show no detectable effects on the damping behavior of high damping Zn-27 pct Al alloy. Similarly, graphite particulates have little effect on the damping capacity of Zn-27 pct Al alloy at low temperatures and, on the contrary, make the transformation peak value of internal friction decrease. It is considered that graphite particulate may repress the eutectoid transformation process of Zn-27 pct Al alloy.

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Authors and Affiliations

  1. the Laboratory of Internal Friction and Defects in Solids, Chinese Academy of Sciences, 230031, Hefei, P.R. China

    Zhonghua Ma Ph.D. Student, Fusheng Han (Professor), Jianning Wei Ph.D. Student & Junchang Gao (Engineer)

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  1. Zhonghua Ma Ph.D. Student
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  2. Fusheng Han
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  3. Jianning Wei Ph.D. Student
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  4. Junchang Gao
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Ma, Z., Han, F., Wei, J. et al. Effects of macroscopic defects on the damping behavior of aluminum and Zn-27 Pct Al alloy. Metall Mater Trans A 32, 2657–2661 (2001). https://doi.org/10.1007/s11661-001-0056-3

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  • DOI: https://doi.org/10.1007/s11661-001-0056-3

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