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The effect of grain size on the mechanical properties of nanonickel examined by nanoindentation

  • Bo Yang EMAIL logo and Horst Vehoff
Published/Copyright: February 14, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 95 Issue 6

Abstract

Nanocrystalline nickel produced by pulsed electrolysis was heat-treated to produce grain sizes from nanoscale to microscale. A special polish allowed to image the specimen with an atomic force microscope (AFM) down to a grain size of 30 nm. Micro- and instrumented nanohardness of these specimens were examined. A NI-AFM (Nanoindenting AFM) was used to measure the interaction between grain boundaries and dislocations. Nanoindentation was performed always in the center of the grains. When the size of the indent was kept constant (constant strain) it could be shown that the hardness scales with the dislocation density within the grains. However, when the size of the indent approached the grain size, the plastic zone spread over several grains and a decrease in hardness was observed. In addition, with deceasing grain size, grain boundary sliding was observed even at room temperature.

Keywords: Nanocrystals; Nanoindentation; Hall – Petch relation; Size effect; Grain boundary sliding

Dedicated to Professor Dr. Peter Neumann on the occasion of his 65th birthday

Dipl.-Ing. Bo Yang Universität des Saarlandes Grundlagen der Werkstoffwissenschaften und Methodik (WWM) Postfach 15 11 50 D-66041 Saarbrücken, Germany Tel.: +49 681 302 5043 Fax: +49 681 302 5015

  1. The support of this work under the contract number SFB 277 (B8) is gratefully acknowledged. One author (Bo Yang) is grateful to Prof. Mathias Göken, University Erlangen-Nürnberg, for his advice and help, and to Prof. Hempelmann (Physical Chemistry, SFB 277), for the nano-nickel.

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Received: 2004-01-14
Accepted: 2004-02-21
Published Online: 2022-02-14
Published in Print: 2022-02-14

© 2004 Carl Hanser Verlag, München

Articles in the same Issue

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  2. Editorial
  3. Editorial
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  5. Thermally assisted motion of dislocations in solid solution-strengthened fcc alloys and the concept of “stress equivalence”
  6. From single to collective dislocation glide instabilities: A hierarchy of scales, embracing the Neumann strain bursts
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  11. Influence of dissolved gas molecules on the size recovery kinetics of cold-rolled BPA-PC
  12. Comparison between Monte Carlo and Cluster Variation method calculations in the BCC Fe–Al system including tetrahedron interactions
  13. Experimental study and Cluster Variation modelling of the A2/B2 equilibria at the titanium-rich side of the Ti–Fe system
  14. Phases and phase equilibria in the Fe–Al–Zr system
  15. On the plate-like τ-phase formation in MnAl–C alloys
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  17. The grain boundary hardness in austenitic stainless steels studied by nanoindentations
  18. The effect of grain size on the mechanical properties of nanonickel examined by nanoindentation
  19. Microstructures and mechanical properties of V–V3Si eutectic composites
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  27. Notifications/Mitteilungen
  28. Personal/Personelles
  29. Conferences/Konferenzen
https://doi.org/10.1515/ijmr-2004-0099
Keywords for this article
Nanocrystals; Nanoindentation; Hall – Petch relation; Size effect; Grain boundary sliding

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles Basic
  5. Thermally assisted motion of dislocations in solid solution-strengthened fcc alloys and the concept of “stress equivalence”
  6. From single to collective dislocation glide instabilities: A hierarchy of scales, embracing the Neumann strain bursts
  7. Geometry and surface state effects on the mechanical response of Au nanostructures
  8. Microstructural evolution and its effect on the mechanical properties of Cu–Ag microcomposites
  9. Deformation behaviour of strontium titanate between room temperature and 1800 K under ambient pressure
  10. The deformation response of ultra-thin polymer films on steel sheet in a tensile straining test: the role of slip bands emerging at the polymer/metal interface
  11. Influence of dissolved gas molecules on the size recovery kinetics of cold-rolled BPA-PC
  12. Comparison between Monte Carlo and Cluster Variation method calculations in the BCC Fe–Al system including tetrahedron interactions
  13. Experimental study and Cluster Variation modelling of the A2/B2 equilibria at the titanium-rich side of the Ti–Fe system
  14. Phases and phase equilibria in the Fe–Al–Zr system
  15. On the plate-like τ-phase formation in MnAl–C alloys
  16. Articles Applied
  17. The grain boundary hardness in austenitic stainless steels studied by nanoindentations
  18. The effect of grain size on the mechanical properties of nanonickel examined by nanoindentation
  19. Microstructures and mechanical properties of V–V3Si eutectic composites
  20. Grain boundary characterization and grain size measurement in an ultrafine-grained steel
  21. On the determination of the volume fraction of Ni4Ti3 precipitates in binary Ni-rich NiTi shape memory alloys
  22. Mechanical properties of NiAl–Cr alloys in relation to microstructure and atomic defects
  23. Characterization of the cyclic deformation behaviour and fatigue crack initiation on titanium in physiological media by electrochemical techniques
  24. Effect of prestraining on high-temperature fatigue behaviour of two Ni-base superalloys
  25. Influence of surface defects and edge geometry on the bending strength of slip-cast ZrO2 micro-specimens
  26. Tensile failure in a superplastic alumina
  27. Notifications/Mitteilungen
  28. Personal/Personelles
  29. Conferences/Konferenzen
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