Compressive deformation behavior of CrMnFeCoNi high-entropy alloy

Min Ji Jang, Soo Hyun Joo, Che Wei Tsai, Jien Wei Yeh, Hyoung Seop Kim

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The compressive deformation behavior of a single phase CrMnFeCoNi high-entropy alloy (HEA) is investigated using experimental and theoretical approaches. The equiaxed microstructures are observed using optical microscope, electron backscattered diffraction, and synchrotron X-ray diffraction (XRD) techniques. Compressive results reveal that the CrMnFeCoNi HEA has a high strain-hardening exponent in spite of its large grain size due to increased dislocation density and severe lattice distortion. The compressive texture of the HEA resembles those of typical FCC metals. The phenomenological dislocation-based constitutive model well describes the compressive deformation behavior. The predicted dislocation density is in good quantitative agreement with the experimental value measured using whole-profile fitting of synchrotron XRD peaks. It can be confirmed from the experimental and theoretical findings that the deformation mechanism of the CrMnFeCoNi HEA is the conventional dislocation glide and mechanical twinning is negligible contrary to general belief.

Original languageEnglish
Pages (from-to)982-986
Number of pages5
JournalMetals and Materials International
Volume22
Issue number6
DOIs
Publication statusPublished - 2016 Nov 1

Keywords

  • alloys
  • deformation
  • dislocation
  • metals
  • texture

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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