Phase Transitions of Eutectic High Entropy Alloy AlCoCrFeNi 2.1 Under Shock Compression

作者：Sophie Emilene Parsons, Kento Katagiri, Hangman Chen, Anirudh Hari, Ernest W. Cubit, Sara J. Irvine, Dorian Luccioni, Rayen Lin, Laura Madril, Tharun Reddy, William J. McKinney, Jie Ren, Wuxian Yang, Norimasa Ozaki, Alexis Amouretti, Ryosuke Kodama, Hirotaka Nakamura, Yusuke Nakanishi, Masato Ota, Yusuke Seto, Sota Takagi, Takuo Okuchi, Y. Umeda, Yuichi Inubushi, Kohei Miyanishi, Keiichi Sueda, Tadashi Togashi, Makina Yabashi, T. Yabuuchi, Wen Li, Paul Specht, Penghui Cao, Wen Chen, Yogesh K. Vohra, Leora Dresselhaus‐Marais · 发表于：Advanced Engineering Materials · 年份：2026 · DOI：10.1002/adem.202502073 · 被引用次数：2 · 研究领域：High Entropy Alloys Studies、High-Temperature Coating Behaviors、Additive Manufacturing Materials and Processes

High entropy alloys (HEAs) are a new class of metals that exhibit unique mechanical performance. Among HEAs, additively manufactured eutectic high entropy alloys (AM EHEAs) have recently emerged as candidate materials for use in extreme conditions due to their simultaneous high strength and ductility. However, the deformation and structural evolution of AM EHEAs under conditions of high pressure have not been well characterized, limiting their use in extreme applications. Dynamic compression experiments and molecular dynamics simulations are presented to study the structural evolution of AM EHEA AlCoCrFeNi 2.1 when compressed to pressures up to 400 GPa. In situ X‐ray diffraction measurements capture the appearance of face‐centered cubic and body‐centered cubic phases at different pressure conditions, with pure‐ and mixed‐phase regions. Understanding the phase stability and structural evolution of the AM EHEA offers new insights to guide the development of high‐performance complex materials for extreme conditions.