Abstract
In this work, an attempt is made to study the effect of heat input on mechanical and metallurgical properties of Tungsten Inert Gas (TIG) welded Hastelloy C-276 sheets. Hastelloy C-276 sheets of thickness 1.6mm were used throughout this study. Three butt joints were made by varying the values of welding current in the steps of 1 Ampere. The weld quality was assessed by measuring bead geometry, tensile strength and microhardness. From the experimental results, it was found that the hardness proportionally varied with the change in welding current whereas tensile strength first increased and then decreased with increase in welding current. The weld property variation is discussed with the aid of microstructures taken from Scanning Electron Microscope (SEM), Energy Dispersion Spectroscopy (EDS) and X-ray Diffractometer (XRD).
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