Friction Stir Welding

Friction stir welding (FSW) is a well-developed solid-state welding technique used mainly for alloys with lower melting points that are difficult to weld with conventional arc welding methods. FSW are now also gaining wide acceptance to weld strong metal alloys like steel, inconel, and titanium. FSW is recognised as a green technology due to its smokeless and clean performance.

Current Interests:

1. Modelling of the FSW process using Coupled Eulerian and Lagrangian (CEL) and smoothed particle hydrodynamics (SPH) method.

2. Surface and sub-surface defect prediction in FSW by numerical modelling.

3. Defect prediction in FSW by process monitoring.

4. Modelling of the FSW for different tool designs.

5. Dissimilar and hybrid FSW.

Selected publications:

1. D Das, S Bag, and S Pal: A Finite Element Model for the Prediction of Chip Formation and Surface Morphology in Friction Stir Welding Process, Journal of Manufacturing Science and Engineering, 2021.

2. B. Das, S. Pal and S. Bag: Design and development of force and torque measurement setup for real time monitoring of friction stir welding process, Measurement, 103, 186 - 198, 2017.

3. D Yaduwanshi, S Bag and S Pal: Numerical modeling and experimental investigation on plasma-assisted hybrid friction stir welding of dissimilar materials, Materials & Design, 92, 166 - 183, 2016.