Superelasticity of (TiZrHf)50Ni25Co10Cu15 high entropy shape memory alloy

J. Yaacoub, W. Abuzaid, F. Brenne, H. Sehitoglu

Research output: Contribution to journalArticlepeer-review

Abstract

The paper elucidates the superelastic characteristics of high entropy shape memory alloy (HESMA) (TiZrHf)50Ni25Co10Cu15 over a wide range of deformation temperatures. Axial compression experiments are presented for different heat treatments and local recoverable strains up to 5% are noted. Superelasticity is observed over a large temperature range up to 175°C. Depending on heat treatment, the critical stress exhibits a Clausius-Clapeyron (CC) slope between 1.4 and 6 MPa/°C up to 80 °C deformation temperature. Obvious deviations from linearity however and significantly higher transformation stresses reaching 1200 MPa are reported at higher temperatures. The temperature change during transformation is reported at 9 °C.

Original languageEnglish (US)
Pages (from-to)43-47
Number of pages5
JournalScripta Materialia
Volume186
DOIs
StatePublished - Sep 2020

Keywords

  • High entropy alloy
  • Multi-component alloy
  • Pseudoelasticity
  • Shape memory alloy

ASJC Scopus subject areas

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

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