DefinePK

Abstract

Inconel alloy 617 is used during the research, because it has high strength and oxidation resistance in a wide range of temperatures. It is used in combustion cans, transition liners in both aircraft and land-based gas turbines and medical engineering. Because of its resistance to high-temperature corrosion, the alloy is used for catalyst-grid. Inconel alloy 617 also offers attractive properties of components of power-generating plants, both fossils fuelled plants and nuclear power plants. In the present research, full penetration welding of 1.5 mm thick Inconel 617 plates in a butt configuration was performed by adopting a fiber laser welding machine. The influence of different welding conditions like welding speed, welding power on the heat affected zone (HAZ) morphology, metallurgy and mechanical properties was discussed in detail. Microstructures were assessed by optical microscope and by field emission scanning electron microscope (FE-SEM), while the mechanical behaviour was analysed in terms of Vickers micro-hardness is compared with different welding conditions specimen and base material. Microstructure at different welding parameters was inspected by FE-SEM. Hardness of the base metal is lower in comparison to the fusion zone due to rapid cooling.