Superelasticity of (TiZrHf)50Ni25Co10Cu15 high entropy shape memory alloy. (September 2020)

• Record Type: Journal Article
• Authors: Yaacoub, J.; Abuzaid, W.; Brenne, F.; Sehitoglu, H.
• Is Part Of: Scripta materialia. Number 186(2020)
• Page Start: 43
• Page End: 47
• Publication Date: 2020-09
• Subjects: High entropy alloy -- Pseudoelasticity -- Shape memory alloy -- Multi-component alloy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.04.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The paper elucidates the superelastic characteristics of high entropy shape memory alloy (HESMA) (TiZrHf)50 Ni25 Co10 Cu15 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. Graphical abstract: Image, graphical abstract