2024年12月17日NIMSにて、Prof. Pinaki Prasad Bhattacharjee (IIT Hyderabad)によるご講演が第165回構材ゼミとして開催されました。
日時：2024年12月17日（火曜日）10:45-11:45
場所：NIMS 千現地区 先進構造材料研究棟5階カンファレンスルーム
講演題目：Strategies for Tailoring Microstructure and Properties of High Entropy Alloys
講演者：Prof. Pinaki Prasad Bhattacharjee (Department of Materials Science and Metallurgical Engineering Indian Institute of Technology Hyderabad, India) https://people.iith.ac.in/pinakib/about.html
開催者：村上秀之(セラミックス基複合材料グループ)
講演後の集合写真
Prof. Pinaki Prasad Bhattacharjee(後列右から4番目)
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.