Static and shock compression studies of eutectic high-entropy alloy AlCoCrFeNi2.1 to ultrahigh pressures

Katagiri, Kento; Irvine, Sara J.; Hari, Anirudh; Kodama, Ryosuke; Ozaki, Norimasa; Sano, Takayoshi; Ren, Jie; Yang, Wuxian; Chen, Wen; Clay, Matthew P.; Pope, Andrew D.; Iwan, Seth; Dresselhaus-Marais, Leora E.; Vohra, Yogesh K.

doi:10.1063/5.0192103

Static and shock compression studies of eutectic high-entropy alloy AlCoCrFeNi_2.1 to ultrahigh pressures

Journal Article · Mon Mar 04 00:00:00 EST 2024 · Journal of Applied Physics

DOI:https://doi.org/10.1063/5.0192103· OSTI ID:2318471

^[1]; ^[2]; ^[3]; Kodama, Ryosuke ^[4]; ^[4]; ^[4]; ^[5]; ^[5]; ^[5]; ^[6]; ^[6]; ^[6]; ^[3]; ^[6]

Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); University of Alabama at Birmingham
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford University, CA (United States)
Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Osaka University (Japan)
University of Massachusetts, Amherst, MA (United States)
University of Alabama at Birmingham, AL (United States)

The high-entropy alloy with composition AlCoCrFeNi_2.1, additively manufactured with the laser powder-bed fusion technique, has a far-from-equilibrium BCC/FCC eutectic nanolamellar structure. We studied the high-pressure response of this alloy under both static compression and high-strain rate shock compression. The response to static compression using a diamond anvil cell was studied at pressures up to 302 GPa with synchrotron x-ray diffraction at the advanced photon source. The high-pressure FCC-only phase of the EHEA previously observed by Pope et al. [AIP Adv. 13, 035124 (2023)] is found to be stable up to the highest pressure achieved in this study with a volume compression of V/V₀ = 0.587 at ambient temperature. The shock experiments were performed by using GEKKO XII lasers at the Institute of Laser Engineering, Osaka University. The principal Hugoniot equation-of-state of the EHEA was measured up to a pressure of 515 GPa and a compression of V/V₀ = 0.613. Additionally, the thermal equation of state of the EHEA was measured up to 6.2 GPa and 1623 K using a large-volume Paris–Edinburgh cell to obtain the temperature dependence of bulk modulus and thermal expansion coefficients. The melting temperature for EHEA AlCoCrFeNi_2.1 at a pressure of 5.6 GPa was measured to be 1648 ± 25 K. These results can be used to refine stochastic (or special) quasi-random structure (SQS) models for high-pressure high-temperature behavior of high-entropy alloys.

View Accepted Manuscript (DOE)

Research Organization:: University of Alabama at Birmingham, AL (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)

Grant/Contract Number:: AC02-06CH11357; NA0004154

OSTI ID:: 2318471

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 135; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
Alloys
Bulk modulus
Diamond anvil cells
Equation of state
High-entropy alloy
Lasers
Phase transformation
Shock compression
Shock waves
Static high pressure
Synchrotron X-ray diffraction
Themal effects

Static and shock compression studies of eutectic high-entropy alloy AlCoCrFeNi2.1 to ultrahigh pressures

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Static and shock compression studies of eutectic high-entropy alloy AlCoCrFeNi_2.1 to ultrahigh pressures