Elemental phase partitioning in the γ - γ" Ni2CoFeCrNb0.15 high entropy alloy

Bin Han, Jie Wei, Feng He, Chen Da Chen, Zhi Jun Wang, Alice Hu, Wenzhong Zhou, Ji Jung Kai

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The partitioning of the alloying elements into the γ" nanoparticles in a Ni2CoFeCrNb0.15 high entropy alloy was studied by the combination of atom probe tomography and first-principles calculations. The atom probe tomography results show that the Co, Fe, and Cr atoms incorporated into the Ni3Nb-type γ" nanoparticles but their partitioning behaviors are significantly different. The Co element is much easier to partition into the γ" nanoparticles than Fe and Cr elements. The first-principles calculations demonstrated that the different partitioning behaviors of Co, Fe and Cr elements into the γ" nanoparticles resulted from the differences of their specific chemical potentials and bonding states in the γ" phase.

Original languageEnglish
Article number910
JournalEntropy
Volume20
Issue number12
DOIs
StatePublished - 1 Dec 2018

Keywords

  • Atom probe tomography
  • Elemental partitioning
  • First-principles calculations
  • Gamma double prime nanoparticles
  • High entropy alloy

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