Journal article

The phase stability of equiatomic CoCrFeMnNi high-entropy alloy: Comparison between experiment and calculation results

Park N, Lee B, Tsuji N ...see all

Journal of Alloys and Compounds, vol. 719 (2017) pp. 189-193 Published by Elsevier Ltd

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A comparative study about the phase stability of equiatomic CoCrFeMnNi alloy of thermodynamic calculation (Thermo-Calc) and experimental result is shown. The alloy was processed by through a high-pressure torsion (HPT) process and annealing treatment at temperatures ranging from 900 to 600 °C. Phase identification using X-ray diffraction and energy dispersive X-ray spectroscopy indicated that the Cr-rich sigma phase formed during annealing at temperatures lower than 800 °C after the HPT process, and fraction of sigma phase increased as decreasing annealing temperature as predicted by Thermo-Calc. The thermodynamic calculation based on the TCFE database was found to be suitable for predicting the possible phases in the CoCrFeMnNi alloy.

Author-supplied keywords

  • CoCrFeMnNi
  • High-entropy alloy
  • High-pressure torsion
  • Sigma phase
  • Thermodynamics

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  • Nokeun PARKYeungnam University College of Engineering

  • Byeong Joo Lee

  • Nobuhiro Tsuji

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