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Journal of Materials Science

, Volume 42, Issue 15, pp 6260–6266 | Cite as

Study on the damping behavior of Al/SiCp composite in thermal cycling

  • Hongxiang Zhang
  • Mingyuan Gu
Article
  • 88 Downloads

Abstract

A SiC particulate reinforced 1040 commercially pure aluminum was thermally cycled in air between 20 and 300 °C up to 500 cycles. And the damping capacities of the specimens after 50 and 500 cycles were measured against temperature and strain amplitude. Thermal cycling causes the increase in damping, and dislocation damping is the main mechanism. A damping peak was observed in the range of 150–200 °C, which is related to dislocation motion. Thermal cycling leads to the increase in the peak temperature. The activation energy of the internal friction peak was calculated by Arrhenius equation, yielding 1.02 and 1.09 eV for 50 and 500 cycles, respectively. Increase in dislocation during thermal cycling is responsible for the increase in peak temperature and activation energy.

Keywords

Thermal Cycling Internal Friction Plastic Zone Strain Amplitude Dislocation Motion 

Notes

Acknowledgement

The authors are grateful for the financial supported from Nature Science Foundation of China under Grant No. 50271043.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghaiChina

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