A review of the corrosion of laser nitrided Ti‐6Al‐4V

A review of the corrosion of laser nitrided Ti‐6Al‐4V Purpose – The purpose of this paper is to consider the corrosion properties of laser nitrided Ti‐6Al‐4V alloys that have been reported previously by several researchers. Design/methodology/approach – Different kinds of surface nitriding methods of titanium alloys, such as plasma nitriding, ion nitriding, gas and laser nitriding, are introduced. Microstructure changes, such as phase formation and the influence of laser processing parameters in laser nitriding layers of Ti‐6Al‐4V alloys, were investigated using scanning electron microscope, transmission electron microscope, X‐ray photo‐electron spectroscopy, and X‐ray diffraction. Based on investigations presented in the literature, the effect of laser nitriding on the corrosion behavior of Ti‐6Al‐4V alloy was reviewed. Findings – By regulating the laser processing parameter, the microstructure of the nitrided layer can be controlled to optimize corrosion properties. This layer improves corrosion behavior in most environments, due to the formation of a continuous TiNxOy passive film, which can retard the ingress of corrosive ions into the substrate and can maintain a constant value of a current density. Therefore, the laser gas nitrided specimens have a relatively noble corrosion potential and a very small corrosion current, as compared to untreated specimens. Originality/value – This paper comprises a critical review, and its collection of references is useful. It summarizes current knowledge in laser surface treatment research. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

A review of the corrosion of laser nitrided Ti‐6Al‐4V

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Publisher
Emerald Publishing
Copyright
Copyright © 2011 Emerald Group Publishing Limited. All rights reserved.
ISSN
0003-5599
DOI
10.1108/00035591111130523
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to consider the corrosion properties of laser nitrided Ti‐6Al‐4V alloys that have been reported previously by several researchers. Design/methodology/approach – Different kinds of surface nitriding methods of titanium alloys, such as plasma nitriding, ion nitriding, gas and laser nitriding, are introduced. Microstructure changes, such as phase formation and the influence of laser processing parameters in laser nitriding layers of Ti‐6Al‐4V alloys, were investigated using scanning electron microscope, transmission electron microscope, X‐ray photo‐electron spectroscopy, and X‐ray diffraction. Based on investigations presented in the literature, the effect of laser nitriding on the corrosion behavior of Ti‐6Al‐4V alloy was reviewed. Findings – By regulating the laser processing parameter, the microstructure of the nitrided layer can be controlled to optimize corrosion properties. This layer improves corrosion behavior in most environments, due to the formation of a continuous TiNxOy passive film, which can retard the ingress of corrosive ions into the substrate and can maintain a constant value of a current density. Therefore, the laser gas nitrided specimens have a relatively noble corrosion potential and a very small corrosion current, as compared to untreated specimens. Originality/value – This paper comprises a critical review, and its collection of references is useful. It summarizes current knowledge in laser surface treatment research.

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: May 24, 2011

Keywords: Corrosion; Alloys; Surface treatment; Lasers

References

  • Corrosion resistance and ion dissolution of titanium with different surface microroughness
    Chen, G.; Wen, X.; Zhang, N.
  • Plasma assisted nitridation of Ti‐6Al‐4V
    Fouquet, V.; Pichon, L.; Drouet, M.; Straboni, A.
  • Overlapping laser tracks to produce a continuous nitrided layer in Ti‐6Al‐4V alloy
    Hu, C.; Baker, T.N.
  • Factors controlling the fatigue strength of nitrided titanium
    Morita, T.; Takahashi, H.; Shimizu, M.; Kawasaki, K.
  • Effects of nitrogen gas flow rates on the microstructure and properties of laser‐nitrided IMI318 titanium alloy (Ti‐4V‐6Al)
    Mridha, S.; Baker, T.N.
  • Corrosion behaviour of laser gas‐nitrided Ti‐6Al‐4V alloy in nitric acid solution
    Razavi, R.S.; Salehi, M.; Monirvaghefi, M.; Gordani, G.R.
  • Corrosion
    Schutz, R.W.
  • Study of the surface layer formed by the laser processing of Ti‐6Al‐4V alloy in a dilute nitrogen environment
    Selamat, M.S.; Baker, T.N.; Watson, L.M.
  • Laser surface nitriding of titanium and a titanium alloy
    Weerasinghe, V.M.; West, D.R.F.; de Damborenea, J.
  • Laser treatment of Ti‐6Al‐4V alloy prior to plasma nitriding
    Yilbas, B.S.; Hashmi, M.S.J.
  • Laser assisted nitriding of Ti‐6Al‐4V alloy: metallurgical and electrochemical properties
    Yilbas, B.S.; Khalid, M.; Shuja, S.Z.

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