Journal of Materials Science

, Volume 42, Issue 5, pp 1728–1732 | Cite as

Plasticity initiation and subsequent deformation behavior in the vicinity of single grain boundary investigated through nanoindentation technique

  • Takahito OhmuraEmail author
  • Kaneaki Tsuzaki
Nano May 2006


The initiation of plasticity and the subsequent state in the vicinity of a single grain boundary during indentation-induced deformation were investigated to understand an elementary step of a stress-strain behavior of polycrystalline materials. Nanoindentation measurements on several points on a single grain boundary and the grain interior of an interstitial-free steel and an analysis on the pop-in behavior and the plastic nanohardness were carried out. The pop-in load P c that was obtained on the loading curve is different for each measurement. However, the loading curves overlap one another and the unloading curves coincide as well after the pop-in event. The nanohardness Hn has no dependence on the P c in the range of 150–550 μN. The relation between P c and Δh can be expressed as a simple cubic polynomial function based on a geometrically necessary dislocation loop model. The fitted function differed for various grains with different crystallographic orientations.


Burger Vector Crystallographic Orientation Critical Shear Stress Indentation Axis Nanoindentation Technique 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Hall EO (1951) Proc R Soc B 64:747Google Scholar
  2. 2.
    Petch NJ (1953) J Iron Steel Inst 174:25Google Scholar
  3. 3.
    Li JCM (1963) Trans AIME 227:239Google Scholar
  4. 4.
    Ashby MF (1970) Phil Mag 21:399Google Scholar
  5. 5.
    Hauser JJ, Chalmers B (1961) Acta Matell 9:802CrossRefGoogle Scholar
  6. 6.
    Carrington WE, McLean D (1965) Acta Matell 13:493CrossRefGoogle Scholar
  7. 7.
    Shen Z, Wagoner RH, Clark WAT (1988) Acta Metall 36:3231CrossRefGoogle Scholar
  8. 8.
    Kurzydlowski KJ, Varin RA, Zielinski W (1984) Acta Metall 32:71CrossRefGoogle Scholar
  9. 9.
    Lee TC, Robertson IM, Birnbaum HK (1990) Met Trans 21A:2437Google Scholar
  10. 10.
    Wang MG, Ngan AHW (2004) J Mater Res 19:2478CrossRefGoogle Scholar
  11. 11.
    Ohmura T, Minor AM, Stach EA, Morris JW Jr (2004) J Mater Res 19:3626CrossRefGoogle Scholar
  12. 12.
    Ohmura T, Tsuzaki K, Yin F (2005) Mater Trans 46:2026CrossRefGoogle Scholar
  13. 13.
    Oliver WC, Pharr GM (1992) J Mater Res 7:1564Google Scholar
  14. 14.
    Johnson KL (1985) Contact mechanics. Cambridge University Press, Cambridge, UK, pp. 84–106Google Scholar
  15. 15.
    Shibutani Y, Koyama A (2004) J Mater Res 19:183CrossRefGoogle Scholar
  16. 16.
    Nix WD, Gao H (1998) J Mech Phys Solids 46:411CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Structural Metals Center, National Institute for Materials ScienceTsukuba, IbarakiJapan

Personalised recommendations