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Local Atomic Structure of a High-Entropy Alloy: An X-Ray and Neutron Scattering Study

  • Symposium: Bulk Metallic Glasses IX
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Abstract

By using high-energy synchrotron X-ray and neutron scattering, the local structure of a ternary high-entropy alloy Zr1/3Nb1/3Hf1/3 is characterized by means of pair distribution function (PDF) analysis. Results show that this alloy is a body center cubic (b.c.c.) phase in both bulk sample and in a thin film ~1.5 µm thick. The PDFs obtained from X-ray diffraction and neutron diffraction agree well with each other. The measured PDFs differ from the calculated PDF, particularly in the peak shape of the first two peaks, indicating local lattice distortion due to different atomic sizes in the solid solution.

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Acknowledgments

The authors would like to thank D. Robinson for help at the ID-6 beamline setup and A. Llobet for the experiments conducted on the HIPD beamline of the Lujan Neutron Scattering Center at thw Los Alamos National Laboratory. Use of the Advanced Photon Source is supported by the U.S. Department of Energy (DOE), Office of Science, under Contract No. DE-AC02-06CH11357. The Lujan Center of the Los Alamos National Laboratory is funded by the US Department of Energy, Office of Science, Office of Basic Energy Science, under contract No. DE-AC52-06NA25396. This project was supported by the Department of Energy EPSCoR Implementation award, DE-FG02-08ER46528.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA

    Wei Guo (Graduate Research Assistant), Wojciech Dmowski (Research Associate Professor), Ji-Yong Noh (Graduate Research Assistant), Philip Rack (Professor) & Peter K. Liaw (Professor)

  2. Joint Institute for Neutron Sciences, Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA

    Takeshi Egami (Professor)

  3. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA

    Takeshi Egami (Professor)

  4. Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Takeshi Egami (Professor)

Authors
  1. Wei Guo
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  2. Wojciech Dmowski
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  3. Ji-Yong Noh
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  4. Philip Rack
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  5. Peter K. Liaw
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  6. Takeshi Egami
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Corresponding author

Correspondence to Peter K. Liaw.

Additional information

Manuscript submitted April 13, 2012.

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Guo, W., Dmowski, W., Noh, JY. et al. Local Atomic Structure of a High-Entropy Alloy: An X-Ray and Neutron Scattering Study. Metall Mater Trans A 44, 1994–1997 (2013). https://doi.org/10.1007/s11661-012-1474-0

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  • DOI: https://doi.org/10.1007/s11661-012-1474-0

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