Tribocorrosion response of laser clad TiNiZrO2 composite coatings on Ti6Al4V

Babatunde Abiodun Obadele, Anthony Andrews, Peter Apata Olubambi, Mathew Thoppil Mathew, Sisa Pityana

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The design of tribocorrosion resistant composite on Ti6Al4V alloy by laser surface cladding of admixed metal-ceramic powder was successfully achieved using a 2 kW CW ytterbium laser system (YLS). The effects of TiNiZrO2 addition on the tribocorrosion properties of the synthesized composite coatings were investigated in 1 M H2SO4 solution using open circuit potential and potentiodynamic polarization techniques. The experimental results showed that TiNiZrO2 refined the microstructure to flower-like structure. A strong metallurgical bond was obtained between the coatings and the Ti6Al4V alloy substrate with inter-columnar widmansttaten α΄ grains at the interface. There was a significant increase in surface microindentation hardness values of the clad layers. Also, the presence of zirconia shifted the tribocorrosion potential to more noble values and significantly enhanced the tribocorrosion resistance of the composites.

Original languageEnglish
Title of host publicationLight Metals Technology 2015
EditorsSilethelwe Chikosha, Hilda K. Chikwanda
PublisherTrans Tech Publications Ltd
Pages345-350
Number of pages6
ISBN (Print)9783038355625
DOIs
Publication statusPublished - Jan 1 2015
Externally publishedYes
Event7th International Light Metals Technology Conference, LMT 2015 - Port Elizabeth, South Africa
Duration: Jul 27 2015Jul 29 2015

Publication series

NameMaterials Science Forum
Volume828-829
ISSN (Print)0255-5476

Conference

Conference7th International Light Metals Technology Conference, LMT 2015
CountrySouth Africa
CityPort Elizabeth
Period7/27/157/29/15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Obadele, B. A., Andrews, A., Olubambi, P. A., Mathew, M. T., & Pityana, S. (2015). Tribocorrosion response of laser clad TiNiZrO2 composite coatings on Ti6Al4V. In S. Chikosha, & H. K. Chikwanda (Eds.), Light Metals Technology 2015 (pp. 345-350). (Materials Science Forum; Vol. 828-829). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.828-829.345