Journal article

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

Moon J, Qi Y, Tabachnikova E, Estrin Y, Choi W, Joo S, Lee B, Podolskiy A, Tikhonovsky M, Kim H ...see all

Materials Letters, vol. 202 (2017) pp. 86-88 Published by Elsevier B.V.

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Abstract

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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