A simplified model connecting lattice distortion with friction stress of Nb-based equiatomic high-entropy alloys

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Original languageEnglish
Pages (from-to)340-346
Journal / PublicationMaterials Research Letters
Issue number8
Online published2 May 2019
Publication statusPublished - 2019



We conducted systematically tensile tests with a series of Nb-based equiatomic alloys with single-phase, body-centered-cubic (bcc) structure. By subtracting all possible strengthening contributions, the intrinsic strength (or lattice friction stress) of each alloy was extracted. It was found that lattice friction stress scaled linearly with the lattice distortion in these Nb-based alloys. A simple model was developed to interpret this result. Strengthening effects of lattice distortion and dislocation core width between bcc Nb-based and face-centered-cubic (fcc) Ni-based equiatomic alloys were also compared. It was demonstrated that the enhanced strength in high-entropy alloys was attributable to the lattice distortion.

Research Area(s)

  • High-entropy alloy, Peierls stress, lattice distortion, lattice friction stress, SINGLE-PHASE, MECHANICAL-PROPERTIES, DEFORMATION, SIZE, MICROSTRUCTURE, STABILITY, BEHAVIOR

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