Indentation creep surface morphology of nickel-based single crystal superalloys

Baoxing XU, Akio YONEZU, Zhufeng YUE, Xi CHEN*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

18 Citations (Scopus)


The crystallographic orientation dependence of surface morphology of indentation creep on a nickel-based single crystal superalloy is investigated by using crystal plasticity slip theory with a three-dimensional (3D) finite element model. The numerical results show that the pile-up patterns developed around the indentation imprint exhibit four-, two-, and threefold symmetry on the surfaces of [0 0 1]-, [0 1 1]-, and [1 1 1]-oriented single crystals, respectively. The evolution of radial and hoop stresses around the crater provides important information for possible radial crack nucleation, whose critical locations depend on crystallographic orientations. These characteristics can be well explained in the viewpoint of crystallographic anisotropy. The findings may shed some light on understanding of the crystal structures and its time-dependent deformation mechanisms with the indentation method. © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)275-285
Number of pages11
JournalComputational Materials Science
Issue number2
Early online date2 Apr 2009
Publication statusPublished - Aug 2009
Externally publishedYes

Bibliographical note

The authors would like to thank the Research Fund for the Doctoral Program of Higher Education (N6CJ0001), the Doctorate Fund of Northwestern Polytechnical University and the financial supports from National Science Foundation (CMMI-0643726).


  • Crystal plasticity
  • Finite element method
  • Fracture
  • Indentation creep
  • Nickel-based superalloys
  • Single crystal


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