High-Entropy Alloys

Dr. B.S. Murty is a Professor, Department of Metallurgical and Materials Engineering, IIT Madras, Chennai, India. He has pioneered the synthesis of nanocrystalline materials by mechanical alloying route. His other important contributions are in the field of bulk metallic glasses and in-situ composites. He has co-authrored a Text Book on Nanoscience and Nanotechnology. He has also made significant contributions to the field of high-entropy alloys. Jien-Wei Yeh is a pioneering materials scientist whose expertise spans aluminum and magnesium alloys, metal matrix composites, metallic glasses, coatings, reciprocating extrusion, and high-entropy materials (HEMs). Since 1995, he has led groundbreaking research that redefined alloy design by proposing material compositions beyond traditional boundaries, unlocking vast compositional possibilities across the Periodic Table. He coined and defined “high-entropy alloys (HEAs),” established their four core effects, and laid the theoretical foundation for this rapidly expanding field. His work further extended high-entropy concepts to ceramics, polymers, and composites, catalyzing global development of high-entropy materials. He has been elected as an academician in Academia Sinica, and has received many prestigious awards, including the Executive Yuan Award for Outstanding Science and Technology Contribution (2021) and the Taiwan Presidential Scientific Award (2025). In Stanford’s global rankings in scientific influence, he ranked second worldwide in Materials.Dr. Srinivasa Ranganathan is NASI Platinum Jubilee Fellow at the Indian Institute of Science, Bangalore. His academic career as an educator and researcher in metallurgy for the past four decades at the Banaras Hindu University and the Indian Institute of Science has been stellar. He has made significant contributions to our understanding of the structure of interfaces, quasicrystals, bulk metallic glasses and nanostructured materials. He has co-authored a book on New Geometries for New Materials. Dr. Pinaki Bhattacharjee is an Associate Professor in the Department of Materials Science and Engineerinng at the Indian Institute of Technology Hyderabad. His research interests include deformation and restoration behaviour of metallic materials, as well as crystallographic texture, and the application of high resolution Electron Back Scatter Diffraction (EBSD) and Transmission Electron Microscopy (TEM) techniques in materials characterization.

• 1. A brief history of alloys and the birth of high-entropy alloys2. High-entropy alloys: basic concepts3. Physical metallurgy of high-entropy alloys (New Chapter)4. Alloy design and phase selection rules in high-entropy alloys5. Alloy Design in the 21st century: ICME and materials genome and artificial intelligence strategies6. Synthesis and processing7. Solid Solution phases and their microstructures in HEAs8. Special subgroups of high-entropy alloys9. High-entropy ceramics (New chapter)10. High-entropy alloy coatings (New chapter)11. Structural properties12. Functional properties13. Applications and future directions