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Optimisation of the wear resistance properties of laser cladded T-800 coatings

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Abstract

Taguchi design of experiments (DoE) was employed to determine appropriate laser cladding (LC) parameters for optimising microstructural and anti-wear properties of Tribaloy (T-800) coatings. The nature of wear mechanism was also explored with scanning electron microscopy (SEM). Statistical analysis established that both microhardness and wear rates were primarily dependent on powder feed rates and scanning speeds while coefficient of friction (COF) is significantly influenced by spot diameter. Variation in wear morphology, across the samples, could be explained by presence or absence of surface defects; sizes of surface defects, distance between the surface defects as well as the nature of evolving microstructure within the clad samples. Optimum samples were imparted with microhardness (900 HV), COF (0.0743) and specific wear rate (0.0071 mm3/N/m), and these compared favourably well with the predicted values. Samples fabricated with optimum LC parameters are suitable for wear application in mining industries.

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Funding

This research is supported by the African Laser Center (ALC) under Grant no. CSIR-NLC Reference LHIL 500 task ALC R014 and Botswana International University of Science & Technology (BIUST) Research Initiation Fund under Grant no. BIUST/ds/r&I/7/2016. The authors are grateful to Mr. Samuel Skhosane for his assistance in operating the laser facility at CSIR, Pretoria, South Africa.

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Authors and Affiliations

  1. Department of Mechanical, Energy and Industrial Engineering, Botswana University of Science and Technology, Palapye, Botswana

    Kinsman Malikongwa & Eyitayo Olatunde Olakanmi

  2. Laser Enabled Manufacturing Division, Additive Manufacturing Research Group, National Laser Center CSIR, Pretoria, 0001, South Africa

    Monnamme Tlotleng

  3. Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park, Kingsway Campus, Johannesburg, 2006, South Africa

    Monnamme Tlotleng

Authors
  1. Kinsman Malikongwa
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  2. Monnamme Tlotleng
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  3. Eyitayo Olatunde Olakanmi
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Contributions

Conceptualization: EOO and KM, investigation; KM and MT, methodology, KM, MT and EOO, resources; EOO and MT, supervision; EOO and MT, writing of original draft; KM, writing of review and editing; EOO and MT, funding acquisition. All authors have read and agreed to the published version of the manuscript

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Correspondence to Eyitayo Olatunde Olakanmi.

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Malikongwa, K., Tlotleng, M. & Olakanmi, E.O. Optimisation of the wear resistance properties of laser cladded T-800 coatings. Int J Adv Manuf Technol 114, 481–496 (2021). https://doi.org/10.1007/s00170-021-06718-y

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  • DOI: https://doi.org/10.1007/s00170-021-06718-y

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