Deformation-induced phase transformation of Co20Cr26Fe20Mn20Ni14 high-entropy alloy during high-pressure torsion at 77 K

  • Moon J
  • Qi Y
  • Tabachnikova E
 et al. 
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A deformation-induced phase transformation in a face-centered cubic (FCC) Co20Cr26Fe20Mn20Ni14 high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co20Cr26Fe20Mn20Ni14 alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. Microstructural and compositional analyses suggest that a diffusionless deformation-induced FCC-to-HCP phase transformation occurred during cryogenic HPT.

Author-supplied keywords

  • High-entropy alloy
  • High-pressure torsion
  • Metals and alloys
  • Microstructure
  • Phase transformation

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  • Jongun Moon

  • Yuanshen Qi

  • Elena Tabachnikova

  • Yuri Estrin

  • Won Mi Choi

  • Soo Hyun Joo

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