Plasticity performance of Al0.5CoCrCuFeNi high-entropy alloys under nanoindentation

Li ping Yu, Shu ying Chen, Jing li Ren, Yang Ren, Fu qian Yang, Karin A. Dahmen, Peter K. Liaw

Research output: Contribution to journalArticle

Abstract

The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy, Al0.5 CoCrCuFeNi, were analyzed for the nanoindentation performed at two temperatures. Critical behavior of serrations at room temperature and chaotic flows at 200 °C were detected. These results are attributed to the interaction among a large number of slip bands. For the nanoindentation at room temperature, recurrent partial events between slip bands introduce a hierarchy of length scales, leading to a critical state. For the nanoindentation at 200 °C, there is no spatial interference between two slip bands, which is corresponding to the evolution of separated trajectory of chaotic behavior.

Original languageEnglish (US)
Pages (from-to)390-396
Number of pages7
JournalJournal of Iron and Steel Research International
Volume24
Issue number4
DOIs
StatePublished - Apr 2017

Keywords

  • Chaotic behavior
  • Critical behavior
  • High-entropy alloys
  • Nanoindentation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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