Science in China Series A: Mathematics

, Volume 44, Issue 5, pp 655–661 | Cite as

Effects of macroscopic bulk defects on the damping behaviors of materials

  • Zhonghua Ma
  • Fusheng Han
  • Jianning Wei
  • Junchang Gao


A large number of macroscopic pores or graphite participates were introduced into commercially pure Al and ZA27 alloy by infiltration process to comparatively study the influence of macroscopic defects on the damping behaviors of the materials. The mean diameter of the bulk defects is ( 1.0 ± 0.5) mm, and the volume fractions of pores and graphite particulates are in the range of 50%– 75% and 19%–94%, separately. It is shown that addition of a number of pores or graphite particulates can significantly improve the damping of commercially pure AI, due to the comprehensive effects of the macroscopic and microscopic defects. However, the pores have little effect on the damping capacity of high damping ZA27 alloy, and graphite particulates make the high temperature internal friction peak decrease. It is considered that graphite particulates may repress the intrinsic damping mechanism of ZA27 alloy.


damping materials internal friction defects 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Han, F. S., Zhu, Z. G., Liu, C. S., Nonlinear internal friction character of foamed aluminum, Chinese Phys. Lett., 1998, 15(1): 52–53.CrossRefGoogle Scholar
  2. 2.
    Zhang, J., Perez, R., Lavemia, E. J., Effect of SiC and agraphile particulates on the damping behavior of metal matrix composites, Acta Metal. Mater., 1994, 42(2): 395–409.CrossRefGoogle Scholar
  3. 3.
    Eric, A.B., Smithells Metals Reference Book, Sixth Edition, London: Butterworth & Co. Ltd., 1983, 34–49.Google Scholar
  4. 4.
    Kawabe, H., Kuwahara, K., High damping and modulus characteristics in a superplastic Zn-Al alloy, J. De Physique, 1981, 42(10): C5–941.Google Scholar
  5. 5.
    Lavemia, E. J., Perez, R. J., Zhang, J., Damping behavior of discontinuously reinforced Al alloy metal-matrix composite S, Metall. Mater. Trans., 1995, 26A: 2803–2818.Google Scholar
  6. 6.
    Zhang, J., Perez, R. J., Wong, C. R., Effects of secondary phases on the damping behavior of metals, alloys and metal matrix composites, Mater. Sci. Eng., 1994, R13(8): 325–389.Google Scholar
  7. 7.
    Zeng, H. M., Li, C. G., Gan, F. X. et al.. uEssentials of Advanced Materials for High Technology (in Chinese), Beijing: Science Press, 1993,149–152.Google Scholar
  8. 8.
    Nishiyama, K., Yamanaka, M., Dmori, M. et al., High temperature dependence of the internal friction and modulus change of tetragonal ZrO2, Si3N4 and SiC, J. Mater. Sci. Lett., 1990, 9(5): 526–528CrossRefGoogle Scholar

Copyright information

© Science in China Press 2001

Authors and Affiliations

  • Zhonghua Ma
    • 1
  • Fusheng Han
    • 1
  • Jianning Wei
    • 1
  • Junchang Gao
    • 1
  1. 1.Laboratory of Internal Friction and Defects in Solids, Institute of Solid State PhysicsChinese Academy of SciencesHefeiChina

Personalised recommendations