Laser Metal Deposition (LMD) is an additive manufacturing technique for manufacturing
complex near net shaped components. The grain size of the typical deposition microstructure in
case of Ti-6Al-4V can range between 100µm-600µm, which is much larger than that of forged-like microstructures. Friction Stir Processing (FSP) has been investigated as a method for
surface modification to form refined microstructure at the surface of the Ti-6Al-4V components
manufactured from the LMD method. Integration of FSP and LMD can greatly improve the
product properties. Friction stir processing of the laser deposited Ti-6Al-4V deposits was
performed and optimum processing parameters were obtained using this hybrid process. The
microstructure of the nugget regions obtained in the substrate weld, stir over deposit and deposit
over stir experiments is presented. A much decreasing grain size was observed in the dilution
zone inside the nugget from the stir surface to the bottom of the dilution zone.Mechanical Engineerin
