Relaxation issues in nanoindentation experiments

P. M. Nagy, P. Horváth, D. Aranyi, E. Kálmán

Research output: Contribution to journalConference article

4 Citations (Scopus)


This contribution reports on a systematic investigation of mechanical properties of coarse grained, polycrystalline titanium samples and antimony doped SnO2 thin films (ATO) by depth sensing indentation (nanoindentation) experiment. The combination of nanoindentation and atomic force microscopy provides a straightforward method to follow the indentation and relaxation process of the material, revealing not only the hardness and Young's modulus of the sample, but also gaining information on the deformation process taking place during the indentation. A method was worked out based on computer evaluation of AFM images of nanoindentation impressions to resolve spatially the shape differences between the relaxed hardness indents and the ideal indenter pyramid. It provides a quantitative method to investigate the relaxation characteristic of different materials. Single grains in coarse-grained titanium and the ATO layers were investigated by this combined method, anisotropy and relaxation effects were studied. The hardness and Young's modulus of the ATO layers have been found to be dependent on the preparation method, but the relaxation of various layers are largely uniform. Different Ti grains, however, have uniform hardness and Young's modulus, but the relaxation effects in these samples show orientation dependence.

Original languageEnglish
Pages (from-to)154-160
Number of pages7
JournalCurrent Applied Physics
Issue number2
Publication statusPublished - Feb 1 2006
EventEngineering Aspects of Nanomaterials and Technologies -
Duration: Jan 24 2005Jan 27 2005


  • AFM
  • Anisotropy
  • Image processing
  • Nanoindentation
  • Nanostructured coating
  • Relaxation
  • Thin layer
  • Titanium

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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