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Co-Segregation Effects on Boundary Migration

  • Published:
Interface Science

Abstract

We analyze the effect of co-segregation on the mobility of grain boundaries within the framework of the impurity drag theory originally proposed by Cahn and Lücke and Stüwe for an ideal solution. The new derivation extends this model to the case where there are two types of impurities (or three components in the alloy). Since the resultant expression for the boundary mobility is complicated, numerical solutions were obtained for several cases to show how co-segregation affects the boundary mobility. Depending on the relative diffusivities of the two impurities which are both attracted to the boundary, the mobility may either increase or decrease with increasing concentration of one of the impurities. When one of the impurities is attracted to the boundary and the other repelled from the boundary, increasing the concentration of the attractive impurity can lead to a sharp decrease in the boundary mobility.

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Authors and Affiliations

  1. Princeton Materials Institute &; Department of Mechanical &; Aerospace Engineering, Princeton University, Princeton, NJ, 08544, USA

    M.I. Mendelev & D.J. Srolovitz

Authors
  1. M.I. Mendelev
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  2. D.J. Srolovitz
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Mendelev, M., Srolovitz, D. Co-Segregation Effects on Boundary Migration. Interface Science 10, 191–199 (2002). https://doi.org/10.1023/A:1015880314987

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  • DOI: https://doi.org/10.1023/A:1015880314987

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