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A study of the dissipative properties of homogeneous materials deposited as coatings. Part 2. Copper condensates with different microstructural characteristics

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Abstract

The dependence of dissipative properties of copper condensates on the grain size has been studied. Condensates with a grain size of 0.9–3.7 µm were obtained by electron-beam vapor deposition of copper as coatings on a titanium substrate. The oscillograms of damped bending vibrations of the substrate-coating system were recorded at a frequency of 140–150 Hz in the temperature range 20–350°C. The values of true logarithmic vibration decrement for copper condensates were determined by the self-consistent calculation of energy loss factors of the substrate and coating by the method proposed in the part 1. It has been shown that the amplitude dependences of the true logarithmic vibration decrement of copper condensates at room and elevated temperature are largely determined by their structure.

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Correspondence to A. I. Ustinov.

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Translated from Problemy Prochnosti, No. 2, pp. 149–158, March–April, 2008.

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Ustinov, A.I., Skorodzievskii, V.S. & Kosenko, N.S. A study of the dissipative properties of homogeneous materials deposited as coatings. Part 2. Copper condensates with different microstructural characteristics. Strength Mater 40, 275–281 (2008). https://doi.org/10.1007/s11223-008-9004-4

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Keywords

  • copper
  • condensate
  • coating
  • substrate
  • damping
  • vibration decrement