Synthesis, Characterization and Mechanical Properties of Nb-based Alloys

At present, advanced jet engines are being developed to operate at a temperature greater than 1100°C to achieve higher efficiency. The hot section of turbines, nozzles, and afterburners are some components of jet engines subjected to very high temperatures (Ref Fig. from left to right). While designing components for such a high-temperature system, it is necessary to keep in mind the density, room temperature ductility and elevated temperature load-bearing capacities of the alloys being used.

Fig. High temperature applications

(Left: https://www.technicut.co.uk/aeroengine, Middle: https://www.istockphoto.com, Right: https://www.defenceimagery.mod.uk)

Nowadays, gas turbines and aero engines are being manufactured predominantly from nickel (Ni)-based superalloys. However, the working temperature of Ni-based superalloy is limited only up to 1050°C. Therefore, researchers are now developing refractory metal-based alloys because of their high melting points and high-temperature strength.

Among the refractory metal-based alloys, niobium (Nb) alloys exhibit density comparable to Ni-based superalloys and have the potential to be used in gas turbines and aero engines.

My research work mainly focuses on the development of Nb-based alloys. Microstructural and mechanical characterization will be performed to understand the deformation behaviour.