第195回構材ゼミ Dr. Pinaki Prasad BHATTACHARJEE 【開催予告】2026.06.17
2026年6月17日、Dr. Pinaki Prasad BHATTACHARJEE（Indian Institute of Technology Hyderabad (IITH)） によるご講演が第195回構材ゼミとして開催されます。
- 日時
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2026年6月17日（水曜日）11:00-12:00
- 場所
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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
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Dual-Phase High Entropy Alloys: Processing, Microstructure, and Properties
- 講演者
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Prof. Pinaki Prasad BHATTACHARJEE
Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad (IITH), Kandi Sangareddy 502285 Telangana India
Abstract:
High Entropy Alloys (HEAs) were originally conceived as multicomponent alloys with equiatomic or near-equiatomic compositions [1]. Despite their concentrated alloy chemistry, several early-investigated HEAs, including the well-known Cantor alloy, showed the formation of solid-solution phases, presumably due to their large configurational entropy [1]. HEAs evoked phenomenal research interest as a new class of materials, and 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].
Dual-phase HEAs with a combination of hard and soft phases are particularly attractive for tailoring microstructure and mechanical properties via thermo-mechanical processing. In the present talk, we will try to highlight the possibilities of tailoring microstructures and mechanical properties of different classes of dual-phase HEAs, including lamellar (L12+B2) eutectic HEAs (EHEAs), (FCC+Laves), and finally (FCC1+FCC2) phase-separated HEAs (PS-HEAs). We have shown that dual-phase HEAs are highly amenable to microstructural engineering; potentially enabling remarkable micro/nanostructures with outstanding mechanical properties. The talk also aims to highlight the intriguing scientific questions arising from these related developments and the future scope and opportunities for addressing them.
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.