Composition evolution of gamma prime nanoparticles in the Ti-doped CoFeCrNi high entropy alloy

Bin Han, Jie Wei, Yang Tong, Da Chen, Yilu Zhao, Jing Wang, Feng He, Tao Yang, Can Zhao, Yasuo Shimizu, Koji Inoue, Yasuyoshi Nagai, Alice Hu, Chain Tsuan Liu, Ji Jung Kai

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13 Citations (Scopus)

Abstract

The composition evolution of γ′ nanoparticles as a function of aging duration in the Ti-doped CoFeCrNi high entropy alloy was studied by atom probe tomography (APT) and first-principle calculations. The APT results indicate that the evolution behaviors of Co, Fe, and Cr in the Ni3Ti-type γ′ nanoparticles are significantly different. Co saturates to a stable concentration in the γ′ nanoparticles rapidly in the initial stage of the precipitation, whereas Fe and Cr atoms are incorporated into the γ′ nanoparticles during the coarsening. The APT results are supported by the first-principle calculations from the perspective of the electronic state.

Original languageEnglish
Pages (from-to)42-46
Number of pages5
JournalScripta Materialia
Volume148
DOIs
Publication statusPublished - 2018 Apr 15

Keywords

  • Atom probe tomography
  • First-principle calculation
  • High entropy alloy
  • Precipitation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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    Han, B., Wei, J., Tong, Y., Chen, D., Zhao, Y., Wang, J., He, F., Yang, T., Zhao, C., Shimizu, Y., Inoue, K., Nagai, Y., Hu, A., Liu, C. T., & Kai, J. J. (2018). Composition evolution of gamma prime nanoparticles in the Ti-doped CoFeCrNi high entropy alloy. Scripta Materialia, 148, 42-46. https://doi.org/10.1016/j.scriptamat.2018.01.025