Abstract
A study has been conducted of the coarsening reaction which occurs after discontinuous precipitation in Cu-Be alloys. When the discontinuous precipitation is nearly complete, a secondary cellular reaction with much coarser interlamellar spacing forms at the original grain boundaries and advances into the primary cells. The growth rate decreases and the interlamellar spacing increases with the cell growth for the secondary reaction. These phenomena are attributed to the continuous coarsening reaction which simultaneously occurs in the primary cells. Theα phase in the cells produced by the first reaction is supersaturated at the initial cell growth, but attains its equilibrium concentration prior to the appearance of the secondary cells. Cold work does not influence the cell growth of the secondary reaction. The driving force for the secondary reaction is the reduction in total interlamellar surface energy.
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Tsubakino, H., Nozato, R. & Yamamoto, A. Discontinuous and continuous coarsening of lamellar precipitates in Cu-Be alloys. J Mater Sci 26, 2851–2856 (1991). https://doi.org/10.1007/BF01124812
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DOI: https://doi.org/10.1007/BF01124812