Journal of Materials Science

, Volume 45, Issue 8, pp 2233–2238 | Cite as

An experimental study on the influence of particles on grain boundary migration

  • Jesper Janis
  • Keiji Nakajima
  • Andrey Karasev
  • Hiroyuki Shibata
  • Pär G. Jönsson


The pinning effect of particles on grain boundary migration was studied in a Fe–20 mass% Cr alloy deoxidised with Ti and Zr. The different nitrogen contents (65, 248 and 490 ppm) were used to vary the number of precipitated inclusions. The specimens from equiaxed zones of metal samples with different particle densities were examined by in situ observations during a 60-min holding time at 1200 and 1400 °C in a Confocal Scanning Laser Microscope. The change of particles pinning effect on the grain growth was described by an average grain size, \( \bar{D}_{\text{A}} \), and the ratio between the perimeter and area of grains, P GB/A G. It was found that the pinning effect of particles (mostly complex Ti–Zr oxynitrides) on grain growth decreased with a decreased nitrogen content in the metal. Furthermore, the effect of particles decreased with an increased temperature of treatment, due to the reduction of the number of particles on the grain boundaries.


Heat Treatment Nitrogen Content Confocal Scan Laser Microscope Secondary Particle Boundary Migration 
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The authors would like to thank Professor Mats Hillert and Professor Stefan Jonsson at the Royal Institute of Technology (Sweden) for fruitful discussions during preparation of this paper. Some parts of this work has been carried out with a financial grant from the Research Fund for Coal and Steel of the European Community.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Jesper Janis
    • 1
  • Keiji Nakajima
    • 1
  • Andrey Karasev
    • 1
  • Hiroyuki Shibata
    • 2
  • Pär G. Jönsson
    • 1
  1. 1.Royal Institute of Technology—KTH, MSEStockholmSweden
  2. 2.IMRAMTohoku UniversitySendaiJapan

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