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Mechanism for the Origin of Recrystallization Nuclei

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Abstract

When two grains in a polycrystalline specimen meet at a point in the course of grain-boundary movements, and the new boundary created at the point is one of relatively low specific free energy, a nonequilibrium boundary condition occurs. The nonequilibrium is enhanced if the other grain boundaries involved at the point of meeting are relatively high in specific free energy. The nonequilibrium results in a correction by growth of the complex grain (two subgrains) to a large size, sufficient in many cases for it to become a self-propagating unit, i.e., a recrystallization grain. This mechanism, herein called “geometrical coalescence.” is proposed as a logical origin for recrystallization nuclei, particularly for secondary recrystallization.

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References

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Authors and Affiliations

  1. Dept. of Chemical Engineering, New York University, New York, USA

    John P. Nielsen (Member AIME, Associate Professor)

Authors
  1. John P. Nielsen
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Additional information

Discussion on this paper, TP 3841E, may be sent, 2 copies, to AIME by Jan. 1, 1955. Manuscript, Mar. 15, 1954. Chicago Meeting, November 1954.

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Nielsen, J.P. Mechanism for the Origin of Recrystallization Nuclei. JOM 6, 1084–1088 (1954). https://doi.org/10.1007/BF03398351

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  • DOI: https://doi.org/10.1007/BF03398351

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