Synthesis and characterization of a new TiZrHfNbTaSn high-entropy alloy exhibiting superelastic behavior

In this study, a new single-phase bcc Ti35Zr35Hf15Nb5Ta5Sn5 high-entropy alloy (HEA) was developed and investigated by means of cyclic tensile tests, transmission electron microscopy (TEM), electron backscattered diffraction (EBSD) and in situ synchrotron X-ray diffraction (SXRD). The alloy reveals a superelastic behavior due to the reversible stress-induced martensitic transformation that occurs between the beta phase and the alpha '' phase. A high strain recovery of 3.8% is obtained by tensile test, which is attributed to the <110>(beta){447}(beta) recrystallization texture observed. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this study, a new single-phase high-entropy alloy was developed and investigated, showing superelastic behavior and a high strain recovery rate. These phenomena are attributed to reversible stress-induced martensitic transformation between different phases and specific recrystallization texture observed.