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Formation of annealing twins, faceting, and grain boundary pinning in copper bicrystals

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Abstract

In the course of a recent investigation of the kinetics of grain boundary migration in copper bicrystals, formation of annealing twins, faceting and grain boundary pinning have been observed. Stability and frequency of formation of annealing twins are related to boundary misorientation and temperature of anneal. Tendency for grainboundary faceting decreases with increasing temperature indicating that anisotropy of grain boundary energy is more pronounced at lower temperatures. In general, orientations of faceted boundaries corresponded to higher-order twin planes with respect to shrinking grains. At relatively high temperatures (950°C), specimen-thickness-dependent pinning effects also are observed. These observations are described and analyzed in terms of grain boundary structure, energy, and migration behavior.

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Authors and Affiliations

  1. Westinghouse Research Laboratories, 15235, Pittsburgh, Pa.

    R. Viswanathan (Senior Engineer)

  2. Carnegie-Mellon University, 15213, Pittsburgh, Pa.

    C. L. Bauer (Professor of Metallurgy and Materials Science)

Authors
  1. R. Viswanathan
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  2. C. L. Bauer
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Viswanathan, R., Bauer, C.L. Formation of annealing twins, faceting, and grain boundary pinning in copper bicrystals. Metall Trans 4, 2645–2650 (1973). https://doi.org/10.1007/BF02644270

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  • DOI: https://doi.org/10.1007/BF02644270

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