Hot deformation and dynamic recrystallization behavior of cocrni and (Cocrni)94 ti3 al3 medium entropy alloys

Hai Long Yi, Daixiu Wei, Yingchen Wang, Liqiang Wang, Ming Yang Fang, Kang Yang, Hidemi Kato

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The CoCrNi and precipitate-hardened (CoCrNi)94 Ti3 Al3 medium entropy alloys (MEAs) have attracted much attention, due to their exceptional mechanical properties, whereas the hot deformation characteristics have not been revealed. In the present study, we investigated the dynamic recrystallization behavior and microstructure evolutions of the two MEAs hot-compressed at single-phase temperatures. The constitutive equation was obtained, and microstructures were observed. Discontinuous dynamic recrystallization acted as a key mechanism of grain refinement at a relatively higher temperature and lower strain rate, which leads to the formation of a homogeneous grain structure. The addition of Ti and Al promoted dynamic recrystallization due to the solid solution hardening effect. The results provide valuable guidelines for microstructure refinement via thermomechanical processing.

Original languageEnglish
Article number1341
Pages (from-to)1-14
Number of pages14
JournalMetals
Volume10
Issue number10
DOIs
Publication statusPublished - 2020 Oct

Keywords

  • Constitutive equation
  • Hot deformation
  • Medium entropy alloy
  • Microstructure
  • Recrystallization

ASJC Scopus subject areas

  • Materials Science(all)

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