Abstract
This work emphasizes the friction-wear behaviour of NiCrBSi and NiCrBSi reinforced with different weight percentage (20%, 30% and 40%) of tungsten carbide deposited on stainless steel-316L using PTAW process. Phase structure analysis, morphology and elemental analysis was characterised across the cross section of the NiCrBSi and NiCrBSi-WC composites using x-ray diffractometer (XRD) and scanning electron microscope (SEM) with EDAX. The influence of WC particles on the interface thickness of NiCrBSi-WC composites was elaborated with EDAX analysis. Vickers hardness tester was used to measure the hardness at different locations across its interface. Pin-on-disc apparatus was used to study the friction-wear behavior of NiCrBSi and NiCrBSi-WC composites against the hardened EN-31 steel counter disc. The reinforcement of WC particles influenced the formation of Meta stable phases in NiCrBSi-WC composites. Increasing the weight percentage of WC decreased the interface thickness of NiCrBSi-WC composites. Better friction-wear property was obtained for NiCrBSi-(20%) WC composites compared to the other composites. Wear track characterisation confirms the occurrence of abrasive and adhesive wear mechanisms for NiCrBSi-WC composites.
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