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Anelastic relaxation in AI-4 Wt Pct Cu-AI2O3 fiber-reinforced composites

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Abstract

In many industrial applications, like high precision weighing and positioning, the elastic and dimensional stability of materials is required at a nanometric scale. High-resolution laser interferometry and mechanical spectroscopy have been employed to measure low-temperature anelastic creep of the short-fiber-reinforced composite Al-4 wt pct Cu-Al2O3. The typical strain resolution of the laser interferometer is 10-10. Fiber reinforcement has been found to increase the dislocation density in the metal matrix; in parallel, damping and anelastic creep are enhanced. This behavior has been explained on the basis of the structure of interparticle dislocations and θ′ relaxation.

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Authors and Affiliations

  1. Department of Materials, Laboratory of Metallurgy and Mechanics, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland

    Stefano Sgobba (Assistant), Hans-Ulrich KÜNZI (Scientific Assistant) & Bernhard Ilschner (Professor)

  2. Department of Physics, Institute of Atomic Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland

    Lorenzo Parrini (Assistant)

Authors
  1. Stefano Sgobba
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  2. Lorenzo Parrini
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  3. Hans-Ulrich KÜNZI
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  4. Bernhard Ilschner
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Sgobba, S., Parrini, L., KÜNZI, HU. et al. Anelastic relaxation in AI-4 Wt Pct Cu-AI2O3 fiber-reinforced composites. Metall Mater Trans A 26, 2745–2749 (1995). https://doi.org/10.1007/BF02669430

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  • DOI: https://doi.org/10.1007/BF02669430

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