Phase Transitions of Eutectic High Entropy Alloy AlCoCrFeNi <sub>2.1</sub> Under Shock Compression
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.
Authors
- Takuo Okuchi (ORCID: https://orcid.org/0000-0001-6907-0945)
- Yogesh K. Vohra (ORCID: https://orcid.org/0000-0002-2776-3695)
- Yusuke Nakanishi (ORCID: https://orcid.org/0000-0001-8782-9556)
- Keiichi Sueda (ORCID: https://orcid.org/0000-0002-7343-1982)
- Tharun Reddy
- Dorian Luccioni (ORCID: https://orcid.org/0000-0002-0038-9197)
- T. Yabuuchi (ORCID: https://orcid.org/0000-0003-0638-7640)
- Masato Ota (ORCID: https://orcid.org/0000-0001-5629-8326)
- Jie Ren (ORCID: https://orcid.org/0000-0002-6590-7709)
- Norimasa Ozaki (ORCID: https://orcid.org/0000-0002-7320-9871)
- Wen Li (ORCID: https://orcid.org/0000-0002-5543-4899)
- Wuxian Yang (ORCID: https://orcid.org/0009-0007-2391-527X)
- Hangman Chen
- Simon Parsons (ORCID: https://orcid.org/0000-0002-7708-5597)
- Paul Specht (ORCID: https://orcid.org/0000-0002-7007-000X)
- Yuichi Inubushi (ORCID: https://orcid.org/0000-0003-1608-3819)
- Sara J. Irvine (ORCID: https://orcid.org/0009-0008-2637-7769)
- Hirotaka Nakamura (ORCID: https://orcid.org/0009-0002-5679-907X)
- Sota Takagi (ORCID: https://orcid.org/0000-0001-5472-4512)
- Kento Katagiri (ORCID: https://orcid.org/0000-0001-8913-1047)
- Y. Umeda (ORCID: https://orcid.org/0000-0002-9676-6603)
- Yusuke Seto (ORCID: https://orcid.org/0000-0002-5423-2136)
- Tadashi Togashi (ORCID: https://orcid.org/0000-0001-7615-7213)
- Anirudh Hari (ORCID: https://orcid.org/0000-0003-1825-8109)
- Makina Yabashi (ORCID: https://orcid.org/0000-0002-2472-1684)
- Alexis Amouretti (ORCID: https://orcid.org/0000-0001-8114-613X)
- Kohei Miyanishi (ORCID: https://orcid.org/0000-0002-6477-3710)
- Wen Chen (ORCID: https://orcid.org/0000-0003-2048-1107)
- Penghui Cao
- Ryosuke Kodama
- Laura Madril
Institutions
- Agency for Science, Technology and Research (SG)
- University of Southern California (US)
- University of California, Los Angeles (US)
- Carnegie Institution for Science (US)
- University of California, Irvine (US)
- California Southern University (US)
- SLAC National Accelerator Laboratory (US)
- Institute of High Performance Computing (SG)
- University of Alabama at Birmingham (US)
- University of Massachusetts Boston (US)
- Institute for Laser Technology (JP)
- Sandia National Laboratories (US)
- SPring-8 (JP)
- National Institute for Fusion Science (JP)
- Japan Synchrotron Radiation Research Institute (JP)
- Irvine University (US)
- Pulse Biosciences (United States) (US)
- Institute for Integrated Radiation and Nuclear Science, Kyoto University (JP)
- Tokyo Metropolitan University (JP)
- Southern States University (US)
- Stanford University (US)
- The University of Osaka (JP)
Publication Details
- Journal
- Advanced Engineering Materials
- Published
- 2026-01-07
- DOI
- https://doi.org/10.1002/adem.202502073
- Primary Topic
- High Entropy Alloys Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00