Olakanmi, EONyadongo, STMalikongwa, KLawal, SABotes, AnnelizePityana, Sisa L2019-02-132019-02-132019-01Olakanmi, E.O. et al. 2018. Multi-variable optimisation of the quality characteristics of fiber-laser cladded Inconel-625 composite coatings. Surface & Coatings Technology, vol. 357: 289-3030257-8972https://doi.org/10.1016/j.surfcoat.2018.09.063https://www.sciencedirect.com/science/article/pii/S0257897218310478http://hdl.handle.net/10204/10702Copyright: 2018 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work can be found at https://www.sciencedirect.com/science/article/pii/S0257897218310478Inappropriate choice of processing and materials parameters when re-manufacturing industrial equipment, via laser cladding (LC) technique, has adverse implications for attaining durability of equipment in terms of functional performance, efficient lead time and cost savings for equipment repairers. In an attempt to promote the adoption of LC as an efficient equipment re-manufacturing process, this study employs central composite design (CCD) and response surface modeling (RSM) to build mathematical models for optimising the quality characteristics (dilution ratio and microhardness and LC process efficiency) of a composite coating. The quality characteristics of the coating, comprising of Inconel 625 matrix reinforced with tungsten carbide (WC) particles, were optimised as functions of laser energy density, inconel content in the composite coating and shielding gas flow rates. Evidence from this study establishes that laser energy density is the dominant factor which influences all the output responses. It was also revealed that predicted values of the quality characteristics agree with the experimental results within the permissible range of the LC process and materials variables. Consequently, dilution ratio was minimised as coating's microhardness and process efficiency were maximised with appropriate combination of laser energy density, inconel content and shielding gas flow rates. Finally, it may be inferred from this analysis that quality characteristics are optimised at 67.6 wt% inconel content, laser energy density (18.60 J/mm2) and career/shielding gas flow rates (8.86 l/min) with desirability value of 1.00.enDilution ratioEnergy densityInconel 625/WC compositeOptimisationProcess efficiencyResponse surface modelingRSMArticleOlakanmi, E., Nyadongo, S., Malikongwa, K., Lawal, S., Botes, A., & Pityana, S. L. (2019). Multi-variable optimisation of the quality characteristics of fiber-laser cladded Inconel-625 composite coatings. http://hdl.handle.net/10204/10702Olakanmi, EO, ST Nyadongo, K Malikongwa, SA Lawal, Annelize Botes, and Sisa L Pityana "Multi-variable optimisation of the quality characteristics of fiber-laser cladded Inconel-625 composite coatings." (2019) http://hdl.handle.net/10204/10702Olakanmi E, Nyadongo S, Malikongwa K, Lawal S, Botes A, Pityana SL. Multi-variable optimisation of the quality characteristics of fiber-laser cladded Inconel-625 composite coatings. 2019; http://hdl.handle.net/10204/10702.TY - Article AU - Olakanmi, EO AU - Nyadongo, ST AU - Malikongwa, K AU - Lawal, SA AU - Botes, Annelize AU - Pityana, Sisa L AB - Inappropriate choice of processing and materials parameters when re-manufacturing industrial equipment, via laser cladding (LC) technique, has adverse implications for attaining durability of equipment in terms of functional performance, efficient lead time and cost savings for equipment repairers. In an attempt to promote the adoption of LC as an efficient equipment re-manufacturing process, this study employs central composite design (CCD) and response surface modeling (RSM) to build mathematical models for optimising the quality characteristics (dilution ratio and microhardness and LC process efficiency) of a composite coating. The quality characteristics of the coating, comprising of Inconel 625 matrix reinforced with tungsten carbide (WC) particles, were optimised as functions of laser energy density, inconel content in the composite coating and shielding gas flow rates. Evidence from this study establishes that laser energy density is the dominant factor which influences all the output responses. It was also revealed that predicted values of the quality characteristics agree with the experimental results within the permissible range of the LC process and materials variables. Consequently, dilution ratio was minimised as coating's microhardness and process efficiency were maximised with appropriate combination of laser energy density, inconel content and shielding gas flow rates. Finally, it may be inferred from this analysis that quality characteristics are optimised at 67.6 wt% inconel content, laser energy density (18.60 J/mm2) and career/shielding gas flow rates (8.86 l/min) with desirability value of 1.00. DA - 2019-01 DB - ResearchSpace DP - CSIR KW - Dilution ratio KW - Energy density KW - Inconel 625/WC composite KW - Optimisation KW - Process efficiency KW - Response surface modeling KW - RSM LK - https://researchspace.csir.co.za PY - 2019 SM - 0257-8972 T1 - Multi-variable optimisation of the quality characteristics of fiber-laser cladded Inconel-625 composite coatings TI - Multi-variable optimisation of the quality characteristics of fiber-laser cladded Inconel-625 composite coatings UR - http://hdl.handle.net/10204/10702 ER -