Cavitation erosion of the CoCrFeNi high entropy alloy having elemental segregation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

3 Scopus Citations
View graph of relations

Author(s)

  • K. C. Hoi
  • W. H. Lei
  • Yining Liu
  • Jessica T.G. Ferreira
  • Nicete F.T. Cortez
  • C. T. Kwok
  • Y. F. Sun
  • Valentino A.M. Cristino
  • K. H. Lo

Detail(s)

Original languageEnglish
Article number204990
Journal / PublicationWear
Volume530-531
Online published8 Jun 2023
Publication statusPublished - 15 Oct 2023

Abstract

The cavitation-erosion (CE) damage features and a microstructural peculiarity of the CoCrFeNi high entropy alloy (HEA) are presented in this paper. While this HEA is theoretically predicted and often experimentally demonstrated to be a single-phase solid solution, noticeable elemental segregation has been observed in both the interdendritic regions and dendrite interiors in this study. This segregation causes a subtle reduction of lattice parameter, and the interdendritic segregated regions are frequently CE damage initiation sites. In the dendrite interiors, oxygen-rich particles with elemental segregation as their wrappings and the small speckles of elemental segregated regions show different CE damage features. In the dendrite interiors, CE-induced martensite formation is negligibly, and slip lines and their intersections are CE damage initiation sites. While a few CoCrFeNi-based HEAs have been shown to be CE-resistant in the literature, the CE resistance of the CoCrFeNi base itself is not high. © 2023 Elsevier B.V.

Citation Format(s)

Cavitation erosion of the CoCrFeNi high entropy alloy having elemental segregation. / Hoi, K. C.; Lei, W. H.; Liu, Yining et al.
In: Wear, Vol. 530-531, 204990, 15.10.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review