Symposium: Bulk Metallic Glasses IX

Metallurgical and Materials Transactions A

, Volume 44, Issue 5, pp 1994-1997

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

  • Wei GuoAffiliated withDepartment of Materials Science and Engineering, University of Tennessee
  • , Wojciech DmowskiAffiliated withDepartment of Materials Science and Engineering, University of Tennessee
  • , Ji-Yong NohAffiliated withDepartment of Materials Science and Engineering, University of Tennessee
  • , Philip RackAffiliated withDepartment of Materials Science and Engineering, University of Tennessee
  • , Peter K. LiawAffiliated withDepartment of Materials Science and Engineering, University of Tennessee Email author 
  • , Takeshi EgamiAffiliated withJoint Institute for Neutron Sciences, Department of Materials Science and Engineering, University of TennesseeDepartment of Physics and Astronomy, University of TennesseeOak Ridge National Laboratory

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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.