Crystal–Glass High-Entropy Nanocomposites with Near Theoretical Compressive Strength and Large Deformability

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Ge Wu
  • Shanoob Balachandran
  • Baptiste Gault
  • Wenzhen Xia
  • Ziyuan Rao
  • Ye Wei
  • Michael Herbig
  • Wenjun Lu
  • Gerhard Dehm
  • Zhiming Li
  • Dierk Raabe

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2002619
Journal / PublicationAdvanced Materials
Volume32
Issue number34
Online published19 Jul 2020
Publication statusPublished - 27 Aug 2020

Link(s)

Abstract

High-entropy alloys (HEAs) and metallic glasses (MGs) are two material classes based on the massive mixing of multiple-principal elements. HEAs are single or multiphase crystalline solid solutions with high ductility. MGs with amorphous structure have superior strength but usually poor ductility. Here, the stacking fault energy in the high-entropy nanotwinned crystalline phase and the glass-forming-ability in the MG phase of the same material are controlled, realizing a novel nanocomposite with near theoretical yield strength (G/24, where G is the shear modulus of a material) and homogeneous plastic strain above 45% in compression. The mutually compatible flow behavior of the MG phase and the dislocation flux in the crystals enable homogeneous plastic co-deformation of the two regions. This crystal–glass high-entropy nanocomposite design concept provides a new approach to developing advanced materials with an outstanding combination of strength and ductility.

Research Area(s)

  • high-entropy alloys, metallic glasses, nanocomposites, nanotwins, near theoretical strength

Citation Format(s)

Crystal–Glass High-Entropy Nanocomposites with Near Theoretical Compressive Strength and Large Deformability. / Wu, Ge; Balachandran, Shanoob; Gault, Baptiste et al.
In: Advanced Materials, Vol. 32, No. 34, 2002619, 27.08.2020.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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