Optimization of Tribo-Mechanical Behaviours of ENB Coatings Using GRA and ANOVAPages 438-447
Manik Barman Abstract:
Electroless Ni-B (ENB) coatings are prepared over AISI 1040 steel having different compositions to estimate the impact of process parameters on the tribo-mechanical behaviours of coatings and to obtain a suitable set of bath parameters for optimized results. The surface hardness and coefficient of friction (COF) are selected as response parameters. The selected control parameters are NiCl2, NaBH4 and temperature. The control parameters are altered at 3 levels. The current study counts 3 control parameters having 3 levels of each parameter and the experimental combination was determined as per Taguchi's L9 orthogonal array (OA). Grey relational analysis (GRA) is employed to obtain the optimized values of control parameters to achieve a suitable set of response parameters. The GRA result reveals that the NaBH4 is the most significant bath parameter to control the coating behaviour followed by NiCl2 and coating bath temperature. The same result has been validated through ANOVA analysis.
Keywords: Electroless,
Ni-B,
Bath Parameter,
Nano-indentation,
COF,
Grey Relational Analysis (GRA),
ANOVA
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