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The effect of grain size and stress upon grain-boundary sliding

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Abstract

Measurements at 293 K have been made of grain-boundary sliding of Pb and a Pb-2.5 pet Tl alloy over a wide range of grain sizes and of stress including conditions which gave superplastic behavior. Steps at grain boundaries(v) were measured on all specimens and marker-line offsets(w) on sufficient specimens to establish a pattern for values ofk2 in the relation\(s = 1.4 \bar w = k_2 \bar \nu \) to show thatk 2 depends upon duration of testing,t. The average sliding rates/t, the strain due to sliding £ gb and its contribution γ to the total strain £f were derived from the measurements and compared with the predictions of recent theories. Diffusion creep was found to be of minor importance in these tests.

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Authors and Affiliations

  1. CSIRO Division of Tribophysics, Metallurgy Department, University of Melbourne, 3052, Parkville, Australia

    R. C. Gifkins (Senior Principal Research Scientist)

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  1. R. C. Gifkins
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Gifkins, R.C. The effect of grain size and stress upon grain-boundary sliding. Metall Trans A 8, 1507–1516 (1977). https://doi.org/10.1007/BF02644853

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  • DOI: https://doi.org/10.1007/BF02644853

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