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

SCRIPTA MATERIALIA

卷:186

Article

Yaacoub, J.¹  Abuzaid, W.²  Brenne, F.¹  Sehitoglu, H.¹ 

[1] Univ Illinois, Dept Mech Sci & Engn, 1206 W Green St, Urbana, IL 61801 USA

[2] Amer Univ Sharjah, Dept Mech Engn, POB 26666, Sharjah, U Arab Emirates

关键词: High entropy alloy;    Pseudoelasticity;    Shape memory alloy;    Multi-component alloy;   

DOI  :  10.1016/j.scriptamat.2020.04.017

来源: Elsevier

【 摘 要 】

The paper elucidates the superelastic characteristics of high entropy shape memory alloy (HESMA) (TiZrHf)(50)Ni25Co10Cu15 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 degrees C. Depending on heat treatment, the critical stress exhibits a Clausius-Clapeyron (CC) slope between 1.4 and 6 MPa/degrees C up to 80 degrees 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 degrees C. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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