Journal of Materials Science

, Volume 38, Issue 24, pp 4883–4888 | Cite as

The influence of interfacial dislocation arrangements in a fourth generation single crystal TMS-138 superalloy on creep properties

  • J. X. Zhang
  • T. Murakumo
  • Y. Koizumi
  • H. Harada
Article

Abstract

The morphologies of (001) γ/γ′ interfacial dislocation networks are studied through TEM observations. The lattice misfit has an important relation with creep property for superalloy during high temperature creep deformation. The fourth generation superalloy TMS-138 possesses superior creep properties based on its fine interfacial dislocation networks. The networks have two typical characteristics: closely spaced dislocations and stable square morphology during creep deformation. Such arranged dislocations can effectively prevent the slipping dislocations in the γ phase from moving through the γ/γ′ interface and improve drastically the creep resistance in the fourth generation superalloy TMS-138.

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • J. X. Zhang
    • 1
  • T. Murakumo
    • 1
  • Y. Koizumi
    • 1
  • H. Harada
    • 1
  1. 1.National Institute for Materials ScienceTsukuba, IbarakiJapan

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