Mechanical and microstructural response of the Al0.5CoCrFeNi high entropy alloy to Si and Ni ion irradiation

M. Aizenshtein, Z. Ungarish, K. B. Woller, S. Hayun, M. P. Short

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The nearly infinite compositional design space of high entropy alloys (HEAs) presents many opportunities to improve performance in extreme environments, particularly for nuclear reactors. The ability of some HEAs to resist high amounts of radiation damage, while well documented, has not yet been fully exploited. We studied the irradiation effect of different ions (Si and Ni) on the microstructure and mechanical properties of the Al0.5CoCrFeNi alloy at its equilibrium state, and of the individual response of each phase to irradiation. The results show a stronger effect of Si ions and differences in response of the ductile FCC (A1) and brittle ordered BCC (B2) phases towards irradiation. This finding highlights the need to further probe unexplored compositional spaces in HEAs, as further optimization is likely to yield further compositional and microstructural stability with practical applications.

Original languageEnglish
Article number100813
JournalNuclear Materials and Energy
Volume25
DOIs
StatePublished - 1 Dec 2020

Keywords

  • AlCoCrFeNi
  • HEA
  • Irradiation damage
  • Nanoindentation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science (miscellaneous)

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