Dr. Arivazhagan Natarajan, has specialized in studies relating to the joining of similar/dissimilar metals by FSW, FRW, GTAW, LBW, EBW characterization of weld joints, hot corrosion of weld joints. The studies were carried out simulating the service conditions occurring in fossil fuel-based power plants. He has expertise in various techniques for characterization of weld joints and their corrosion behaviour – Optical and Scanning Electron Microscopy, Electron Probe Microanalysis, X-ray Diffraction etc.