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Journal of Materials Science

, Volume 44, Issue 2, pp 520–527 | Cite as

Morphology and constitution of the compound layer formed on nitrided Fe–4wt.%V alloy

  • Santosh S. Hosmani
  • Ralf E. SchacherlEmail author
  • Eric J. Mittemeijer
Article

Abstract

The microstructure of the compound (“white”) layer formed on the surface of Fe–4wt.%V alloy, by nitriding in a gas mixture of ammonia and hydrogen at 580 °C, has been investigated by employing light and scanning electron microscopy, X-ray diffraction and electron probe microanalysis. The compound layer is dominantly composed of γ|-Fe4N nitride. Quantitative analysis of the composition data demonstrated that V is present in the compound layer as VN precipitates, i.e. V is not taken up significantly in (Fe, V) nitrides. A mechanism for compound-layer formation has been proposed.

Keywords

Compound Layer Diffusion Zone White Layer Ferrite Matrix Excess Nitrogen 

Notes

Acknowledgements

The authors are grateful to Mr. P. Kress for assistance with the nitriding experiments and especially to Mrs. S. Haug for carrying out the electron probe microanalysis measurements.

Open Access

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2008

Open AccessThis is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://doi.org/creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • Santosh S. Hosmani
    • 1
  • Ralf E. Schacherl
    • 2
    Email author
  • Eric J. Mittemeijer
    • 1
    • 2
  1. 1.Max Planck Institute for Metals ResearchStuttgartGermany
  2. 2.Institute for Physical MetallurgyUniversity of StuttgartStuttgartGermany

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