Chapter 83 Interfaces Between Dissimilar Crystalline Solids Chapter uri icon

abstract

  • This chapter addresses several aspects of the atomic structure of interfaces in coherent, semicoherent, and incoherent metallic composites studied using atomistic simulations. We consider the energetics associated with the orientation of coherent interfaces in fcc/fcc composite systems, the relevance of coherency stresses to composite strength, and the influence of stress and slip on the structure of semicoherent interfaces. Incoherent interfaces between fcc and bcc metals display the remarkable ability to adopt multiple, quasiperiodic states that are energetically nearly degenerate. These states are shown to be formally describable in terms of displacement gradients or the operation of particular sets of dislocations. The rearrangement of such dislocations may convert one structure into another. Some consequences of multiple states are low formation energies and high mobilities of point defects. Because of their low shear strength, such interfaces act as potent barriers to slip. © 2008 Elsevier B.V. All rights reserved.

author list (cited authors)

  • Demkowicz, M. J., Wang, J., & Hoagland, R. G.

citation count

  • 72

Book Title

  • A Tribute to F.R.N. Nabarro

publication date

  • January 2008