Structural disorder, phase stability and compressibility of refractory body-centered cubic solid-solution alloys

F. X. Zhang; Y. Tong; M. Kirkham; A. Huq; H. Bei; W. J. Weber; Y. Zhang

doi:10.1016/j.jallcom.2020.155970

Structural disorder, phase stability and compressibility of refractory body-centered cubic solid-solution alloys

F. X. Zhang, Y. Tong, M. Kirkham, A. Huq, H. Bei, W. J. Weber, Y. Zhang

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The Debye-Waller factors of refractory bcc solid-solution alloys TiVNbTa and TiVNbMoTa measured by low temperature neutron diffraction are obviously larger than that of the face-centered cubic (fcc) solid-solution alloy NiCoFeCrMn. The bcc lattice of the studied solid-solution alloys is stable up to ∼50 GPa, but a structural distortion is clearly observed at pressures higher than ∼20 GPa. The bulk modulus of bcc high entropy alloys (HEAs) is closely relevant to both the size mismatch in the lattice and the number of elements in the systems.

Original language	English
Article number	155970
Journal	Journal of Alloys and Compounds
Volume	847
DOIs	https://doi.org/10.1016/j.jallcom.2020.155970
State	Published - Dec 20 2020
Externally published	Yes

Funding

This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE) , an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy of Sciences . Neutron diffraction measurements used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The X-ray diffraction and total scattering measurement were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA’s Office of Experimental Sciences . The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357 . This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy of Sciences. Neutron diffraction measurements used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The X-ray diffraction and total scattering measurement were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA's Office of Experimental Sciences. The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

Funders	Funder number
DOE-NNSA's Office of Experimental Sciences
DOE-NNSA’s Office of Experimental Sciences
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Argonne National Laboratory	DE-AC02-06CH11357
Oak Ridge National Laboratory

Keywords

Bulk modulus
High pressure
High-entropy alloy
Neutron diffraction

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10.1016/j.jallcom.2020.155970

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abstract = "The Debye-Waller factors of refractory bcc solid-solution alloys TiVNbTa and TiVNbMoTa measured by low temperature neutron diffraction are obviously larger than that of the face-centered cubic (fcc) solid-solution alloy NiCoFeCrMn. The bcc lattice of the studied solid-solution alloys is stable up to ∼50 GPa, but a structural distortion is clearly observed at pressures higher than ∼20 GPa. The bulk modulus of bcc high entropy alloys (HEAs) is closely relevant to both the size mismatch in the lattice and the number of elements in the systems.",

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AU - Tong, Y.

AU - Kirkham, M.

AU - Huq, A.

AU - Bei, H.

AU - Weber, W. J.

AU - Zhang, Y.

PY - 2020/12/20

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N2 - The Debye-Waller factors of refractory bcc solid-solution alloys TiVNbTa and TiVNbMoTa measured by low temperature neutron diffraction are obviously larger than that of the face-centered cubic (fcc) solid-solution alloy NiCoFeCrMn. The bcc lattice of the studied solid-solution alloys is stable up to ∼50 GPa, but a structural distortion is clearly observed at pressures higher than ∼20 GPa. The bulk modulus of bcc high entropy alloys (HEAs) is closely relevant to both the size mismatch in the lattice and the number of elements in the systems.

AB - The Debye-Waller factors of refractory bcc solid-solution alloys TiVNbTa and TiVNbMoTa measured by low temperature neutron diffraction are obviously larger than that of the face-centered cubic (fcc) solid-solution alloy NiCoFeCrMn. The bcc lattice of the studied solid-solution alloys is stable up to ∼50 GPa, but a structural distortion is clearly observed at pressures higher than ∼20 GPa. The bulk modulus of bcc high entropy alloys (HEAs) is closely relevant to both the size mismatch in the lattice and the number of elements in the systems.

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Structural disorder, phase stability and compressibility of refractory body-centered cubic solid-solution alloys

Abstract

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Keywords

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