Effects of Fe addition on the microstructure and corrosion properties of quasicrystalline Al-Cu-Fe coatings

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

32 Citations (Scopus)

Abstract

The performance of material surface under wear and corrosion environments cannot be fulfilled by the conventional surface modifications and coatings. Therefore, different industrial sectors need an alternative technique for enhanced surface properties. Titanium and its alloys possess poor tribological properties which limit their use in certain industries. This paper focuses on the effect of hybrid coatings Al-Cu-Fe on a grade five titanium alloy using laser metal deposition (LMD) process. Icosahedral Al-Cu-Fe as quasicrystals are a relatively new class of materials which exhibit unusual atomic structure and useful physical and chemical properties. A 3kW continuous wave ytterbium laser system (YLS) attached to a KUKA robot which controls the movement of the cladding process was utilized for the fabrication of the coatings. The titanium cladded surfaces were investigated for its microstructure and corrosion properties at different laser processing conditions. The samples were cut to corrosion coupons and immersed into 3.5% NaCl solution at 28oC using Linear Polarization (LP) techniques. The cross-sectional view of the samples was analysed. It was found that the geometrical properties of the deposits such as width, height and the Heat Affected Zone (HAZ) of each sample remarkably increased with increasing laser power due to the laser-material interaction. It was observed that there are higher number of aluminium and titanium presented in the formation of the composite. The cladded layer showed a uniform crack free surface due to optimized laser process parameters which led to the refinement of the coatings. Sample Al-Cu-5Fe showed increase of 1538.3-times the polarization resistance of the substrate (Ti-6Al-4V alloy). Large amount of aluminium and less amount of iron favour the chemical performance of composite thereby increasing the polarization resistance.

Original languageEnglish
Title of host publication2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages74-79
Number of pages6
ISBN (Electronic)9781538642979
DOIs
Publication statusPublished - 17 Apr 2018
Event9th IEEE International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2018 - Cape Town, South Africa
Duration: 10 Feb 201813 Feb 2018

Publication series

Name2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2018
Volume2018-January

Conference

Conference9th IEEE International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2018
Country/TerritorySouth Africa
CityCape Town
Period10/02/1813/02/18

Keywords

  • Al-Cu-Fe coating
  • LMD
  • Ti-6Al-4Valloy
  • corrosion resistance
  • microstructure

ASJC Scopus subject areas

  • Artificial Intelligence
  • Industrial and Manufacturing Engineering
  • Ceramics and Composites
  • Metals and Alloys

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