DOE OSTI · 3012544
Phase Transitions of Eutectic High Entropy Alloy AlCoCrFeNi 2.1 Under Shock Compression
Abstract
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. Furthermore, 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.
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Parsons, Sophie Emilene [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000281846600), Katagiri, Kento [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000189131047), Chen, Hangman [University of California, Irvine, CA (United States)], Hari, Anirudh [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)], Cubit, Ernest W. [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)], Irvine, Sara Jessica [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)], Luccioni, Dorian [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)], Lin, Rayen [Stanford University, CA (United States); University of California, Los Angeles, CA (United States)], Madril, Laura Elizabeth [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)], Reddy, Tharun [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)], McKinney, William J. [University of California, Irvine, CA (United States)], Ren, Jie [University of Massachusetts, Boston, MA (United States)], Yang, Wuxian [University of Southern California, Los Angeles, CA (United States)], Ozaki, Norimasa [Osaka University (Japan)], Amouretti, Alexis [Osaka University (Japan)], Kodama, Ryosuke [Osaka University (Japan)], Nakamura, Hirotaka [Osaka University (Japan)], Nakanishi, Yusuke [Osaka University (Japan)], Ota, Masato [National Institute for Fusion Science, Gifu (Japan)], Seto, Yusuke [Osaka Metropolitan University (Japan)], Takagi, Sota [Carnegie Institution for Science, Washington, DC (United States)], Okuchi, Takuo [Kyoto University, Osaka (Japan)], Umeda, Yuhei [Kyoto University, Osaka (Japan)], Inubushi, Yuichi [Japan Synchrotron Radiation Research Institute, Hyogo (Japan); RIKEN SPring‐8 Center, Hyogo (Japan)], Miyanishi, Kohei [RIKEN SPring‐8 Center, Hyogo (Japan)], Sueda, Keiichi [RIKEN SPring‐8 Center, Hyogo (Japan)], Togashi, Tadashi [Japan Synchrotron Radiation Research Institute, Hyogo (Japan); RIKEN SPring‐8 Center, Hyogo (Japan)], Yabashi, Makina [Japan Synchrotron Radiation Research Institute, Hyogo (Japan); RIKEN SPring‐8 Center, Hyogo (Japan)], Yabuuchi, Toshinori [Japan Synchrotron Radiation Research Institute, Hyogo (Japan); RIKEN SPring‐8 Center, Hyogo (Japan)], Li, Wanghui [Agency for Science, Technology and Research (A*STAR) (Singapore)], Specht, Paul Elliot [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)], Cao, Penghui [University of California, Irvine, CA (United States)], Chen, Wen [University of Southern California, Los Angeles, CA (United States)], Vohra, Yogesh K. [University of Alabama at Birmingham, AL (United States)], Dresselhaus‐Marais, Leora [Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000207570159). 2026-01-07. Phase Transitions of Eutectic High Entropy Alloy AlCoCrFeNi 2.1 Under Shock Compression. https://doi.org/10.1002/adem.202502073
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