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Friction surfacing process is a friction based solid state coating process, where no fusion of the materials occur. The process is eco-friendly in nature due to the absence of shielding gas as well as the formation of toxic gases during the melting of the coating materials thereby creating new avenues for minimizing environmental pollution. The process avoids melting of the coating material and it is free from most of the problems as encountered in the conventional surfacing processes. This produces coatings with no dilution combined with enhanced mechanical properties. Titanium alloy (Ti 6Al-4V) offers a combination of high strength, light weight, wear and corrosion resistance properties. The aluminium alloy based metal matrix nano composites (AMMNCs) are found to be suitable wear and corrosion resistant material especially for aircraft and space applications. The present work pertains to production of friction surfaced coatings on titanium alloy by using aluminium metal matrix nano composites AA2124-B4C for improving the wear and corrosion resistance of the titanium alloy. The process parameters were then optimized for achieving the desired properties of surfaced coatings. The coating was characterized by metallography, dry sliding wear and potentiodynamic polarization testing. The coating exhibited excellent wear resistance, which is attributed to composite deposited on the surface. The coating was also found to have adequate corrosion resistance. Microstructures obtained from various zones of the surfaced layer were correlated to the enhanced properties.

An Eco Friendly Novel Metal Matrix Nano Composite Friction Surfacing Of Titanium Alloy