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Journal of Materials Science

, Volume 21, Issue 10, pp 3539–3547 | Cite as

High-temperature internal friction in polycrystalline Zircaloy-4

  • F. Povolo
  • B. J. Molinas
Papers

Abstract

The high-temperature internal friction spectrum of polycrystalline Zircaloy-4 is investigated in detail, for a wide range of frequencies. Two internal friction maxima are observed. The lower-temperature peak is interpreted in terms of a relaxation mechanism produced by the sliding of particle-free grain boundaries. The higher-temperature peak is attributed to the sliding of boundaries blocked by small precipitates. Values for the activation enthalpy and the preexponential factor for diffusion along grain boundaries are given, and the viscosity coefficient associated with grain-boundary sliding is determined as a function of temperature.

Keywords

Polymer Viscosity Enthalpy Internal Friction Preexponential Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1986

Authors and Affiliations

  • F. Povolo
    • 1
    • 2
  • B. J. Molinas
    • 3
  1. 1.Departamento de MaterialesComisión Nacional de Energia AtómicaBuenos Aires
  2. 2.Facultad de Ciencias Exactas y Naturales, Departamento de FisicaUniversidad de Buenos AiresBuenos AiresArgentina
  3. 3.Departamento de FisicaUniversidad Nacional de Rosario, Instituto de Fisica RosarioRosarioArgentina

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