High Entropy Alloys

The conventional alloys like steel, superalloys, etc. are based on one principal element with alloying additions done to improve their structural and functional properties. In contrast, high entropy alloys (HEAs) are multicomponent alloys having constituents in equiatomic or near equiatomic ratios. They exhibit simple solid solution structures owing to their high configurational entropy. HEAs have been shown to possess good creep strength, excellent oxidation corrosion and wear resistance, high hardness, superior thermal and chemical stability and good magnetic properties. Therefore, HEAs are being explored for variety of applications and have gathered attention of scientific community worldwide.

Many groups across the nation are actively working on various facets of high entropy alloys. Click here for more information.

Our group studies diverse aspects of high entropy alloys such as phase prediction using thermodynamic and kinetic principles, fundamental properties like diffusion, magnetism, their applicability as high temperature coating material and their oxidation and corrosion behaviour.

Thermodynamic phase predictions in High entropy alloys - The high configurational entropy resulting from the sort of compositions in HEAs was expected to stabilize simple solid solutions in microstructure. But, exceptions to such behaviour were reported in several cases. Therefore, search for the rules governing the phase formation in HEAs has become a major academic interest. Read More

Kinetic phase predictions in High entropy alloys - Phase prediction in high entropy alloys (HEA) is a prime challenge for materials engineers as the final phase determines the properties of the HEA. Several approaches depending on thermodynamic, topological or electronic properties of constituent elements have been explored so far without much success. Read More