In-situ neutron diffraction studies on high-temperature deformation behavior in a CoCrFeMnNi high entropy alloy

Wanchuck Woo, E-Wen Huang*, Jien Wei Yeh, Hahn Choo, Chi Lee, Shan Yi Tu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Abstract An equiatomic, face-centered-cubic, CoCrFeMnNi high-entropy alloy was tensile tested at 800 K and 1,000 K with a nominal strain rate of 6.7 × 10-6 s-1. In addition to the macroscopic (bulk) behavior, mesoscopic (lattice) phenomena during the pseudo-creep deformation were investigated simultaneously using in-situ neutron diffraction. The evolutions of lattice strains, peak widths, and intensities of several hkl reflections suggest that the dominant deformation mode is the dislocation glide at 800 K and diffusion-controlled dislocation creep at 1,000 K.

Original languageEnglish
Article number5630
Pages (from-to)1-6
Number of pages6
JournalIntermetallics
Volume62
DOIs
StatePublished - 1 Jan 2015

Keywords

  • A. High-entropy alloys
  • B. Creep
  • D. Microstructure
  • E. Multiscale
  • F. Diffraction/scattering

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