Atomic-scale homogenization in an fcc-based high-entropy alloy via severe plastic deformation

Hao Yuan, Ming Hung Tsai, Gang Sha, Fan Liu, Zenji Horita, Yuntian Zhu, Jing Tao Wang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The atomic-scale homogenization of a face-centered-cubic-based high-entropy alloy (HEA), Al0.3Cu0.5CoCrFeNi, using severe plastic deformation (SPD) is reported. Atom probe tomography revealed that water quenching from high temperature cannot produce a homogeneous single phase, and clustering of Cu, Al and Ni still exists. Subsequent processing by high-pressure torsion produced nanostructured non-equilibrium single phase with homogeneous elemental distribution at atomic scale. Importantly, such a non-equilibrium single phase is stable at room temperature due to the sluggish diffusion kinetics. These observations suggest that SPD is an effective approach for producing single-phase HEAs for fundamental studies and applications.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalJournal of Alloys and Compounds
Volume686
DOIs
Publication statusPublished - Nov 25 2016

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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