Dr. B.S. Murty is Girija & R. Muralidharan Institute Chair Professor at the Department of Metallurgical and Materials Engineering, IIT Madras since
2004 and is currently the Head of the Department. He has obtained his PhD (1992) from IISc, Bangalore and started his professional career as a faculty
member at IIT Kharagpur and served there during 1992-2004. He is also an Adjunct Professor at Ryerson University, Canada and an Associate Faculty member
of School of Engineering, University of British Columbia, Canada.
His fields of interest are microstructure-property correlations in nano materials and other advanced materials such as bulk metallic glasses, high entropy
alloys and in-situ composites. He has authored about 350 journal publications. He has recently published two books, namely, “Text Book on Nanoscience
and nanotechnology” and “High Entropy Alloys”. He has supervised 31 PhDs and 14 PhDs are ongoing. He has handled over 50 sponsored research projects
and filed 15 patents.
He is a recipient of Shanti Swarup Bhatnagar Award, the highest honour for a scientist in India, a Fellow of all Science Academies and the Engineering
Academy of India, Asia Pacific Academy of Materials and ASM International. He is also the recipient of Life Time Achievement Award by IIT Madras, Metallurgist
of the Year Award and Young Metallurgist Award of Ministry of Steel and Mines, GD Birla Gold Medal, MRSI Medal, INAE Young Engineer Award, INSA Young
Scientist Award and ISCA Young Scientist Award.
ABSTRACT: CHALLENGES IN HIGH ENTROPY ALLOY RESEARCH
HEAs are a new class of multi-component equiatomic (or near equiatomic) alloys, which form simple solid solutions due to their high configurational entropy. The formation of nanocrystalline HEAs has made them more interesting due to their fundamental and technological importance. It is important to note that all multi-component equiatomic alloys do not lead to the formation of single phase solid solution or for that matter mixture of solid solutions. In a number of cases, these so called HEAs, have shown the formation of intermetallic phases and in some cases phase separation of certain elements with high positive enthalpy of mixing with other elements. Prediction of the phase formation in high entropy alloys is a major challenge in this field. Understanding the stability the phases is also a major challenge due to the sluggish diffusivity in these alloys. Processing of the alloys for useful applications is also an important area that is attracting the attention of researchers in this field. The present paper addresses a number of these issues based on the ongoing work in the research group of the speaker.