The role of dislocations in the flow stress grain size relationships

Abstract

Calculations involving pile ups of dislocations, both analytical and numerical, using either discrete dislocations or continuous distribution of dislocations of infinitesimal Burgers vectors, are reviewed in the light of their effects on the relation between yield or flow stress and grain size. The limitations of the pileup models are discussed and some nonpileup theories of yielding are critically reviewed also. More critical experiments are still needed to reveal the fundamental mechanicm of yielding.

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N.J. Y. T. CHOU, formerly with E.C. Bain Laboratory for Fundamental Research, U.S. Steel Corporation, Monroeville, Pa.

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Li, J.C.M., Chou, Y.T. The role of dislocations in the flow stress grain size relationships. Metall and Materi Trans 1, 1145 (1970). https://doi.org/10.1007/BF02900225

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Keywords

  • Burger Vector
  • Slip Plane
  • Stack Fault Energy
  • Screw Dislocation
  • Edge Dislocation