Prof. Pinaki Prasad Bhattacharjee (IIT Hyderabad) gave a lecture at NIMS on December 17, 2024 as the 165th Structural Materials Seminar.
Date and time: December 17th, 2024, 10:45-11:45
Venue: Conference room ,5th floor of advanced structural materials research building, NIMS Senge site
Title: Strategies for Tailoring Microstructure and Properties of High Entropy Alloys
Speaker: Prof. Pinaki Prasad Bhattacharjee (Indian Institute of Technology Hyderabad, India) https://people.iith.ac.in/pinakib/about.html
Organizer: Hideyuki Murakami(Ceramic Matrix Composites Group)
Prof. Pinaki Prasad Bhattacharjee
(back row, 4th from right)
Strategies for Tailoring Microstructure and Properties of High Entropy Alloys
Prof. Pinaki Prasad Bhattacharjee (IIT Hyderabad)
Abstract:
High Entropy Alloys (HEAs) were originally considered multicomponent alloys with equiatomic or near-equiatomic compositions [1]. Notwithstanding the apparent compositional complexities, many HEAs showed the formation of solid-solution phases attributed to their large configurational entropy [1]. Subsequently, the scope of HEAs was expanded to explore the massive composition space for developing compositionally complex alloys (CCAs) with novel mechanical properties [2, 3].
The properties of HEAs can be further engineered by microstructural tailoring using thermo-mechanical processing strategies. To this effect, we have explored the possibilities of tailoring microstructures and mechanical properties of different classes of HEAs, including single-phase FCC equiatomic HEAs, lamellar (L12+B2) eutectic HEAs (EHEAs), and novel intermetallic-containing HEAs. We have demonstrated that innovative thermomechanical processing strategies can lead to novel heterogeneous micro/nanostructures with outstanding mechanical properties. The talk is intended to highlight these developments and the prospects of developing HEAs as advanced structural materials.
References
1. J.W. Yeh, S.K. Chen, S.J. Lin, J.Y. Gan, T.S. Chin, T.T. Shun, C.H. Tsau, and S.Y. Chang, Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes, Adv. Eng. Mater. 6 (2004) 299–303.
2. S. Gorsse, D.B. Miracle, O.N. Senkov, Mapping the world of complex concentrated alloys, Acta Mater. 135 (2017) 177-187.
3. B.S. Murty, J.W. Yeh, S. Ranganathan, P.P. Bhattacharjee, High Entropy Alloys, 2nd edition, Elsevier, 2019.