High-entropy CoCrFeMnNi alloy subjected to high-strain-rate compressive deformation

Shao Pu Tsai, Yu Ting Tsai, Yu Wen Chen, Pin Jung Chen, Po Han Chiu, Chih Yuan Chen, Woei Shyan Lee, Jien Wei Yeh, Jer Ren Yang

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Split Hopkinson pressure bar (SHPB) experiments were conducted to investigate the mechanical behavior and microstructure evolution of CoCrFeMnNi alloy (Cantor alloy) under three strain rates (3 × 103, 6 × 103, and 9 × 103 s−1) at room temperature. The corresponding deformed samples were studied mainly by transmission electron microscopy (TEM), with the focus on the defected structures. The results indicate that the flow stress and strain-hardening rate are both significantly dependent on strain rate. Nano-twinning occurred during deformation at 9 × 103 s−1, whereas dislocation-glide was dominant during deformation at 3 × 103 s−1. The transition of deformation modes under different dynamic compression rates is discussed.

Original languageEnglish
Pages (from-to)193-198
Number of pages6
JournalMaterials Characterization
Volume147
DOIs
Publication statusPublished - 2019 Jan

All Science Journal Classification (ASJC) codes

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

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