A high-entropy alloy showing gigapascal superelastic stress and nearly temperature-independent modulus

• DOI: 10.1038/s41467-025-56580-9
• Publication Date: 2025-01-31T19:17:11Z
• Authors: Junming Gou; Guoxin Liu; Tianzi Yang; Xiaolian Liu; Yun Pan; Chang Liu; Yu Qian; Yao Liu; Ying Chen; Xuefeng Zhang; Tianyu Ma; Xiaobing Ren
• Keywords: Science; Q; Article

High-performance superelastic materials with a combination of high stress, large elastic recovery strain, and stable modulus over wide temperature range are highly desired for variety technological applications. Unfortunately, it is difficult to achieve these multi-functionalities simultaneously because most have encounter the softening effect limited whereas Elinvar-type show small strain limit. Here, we report (TiZrHf)44Ni25Cu15Co10Nb6 high-entropy alloy that meets all requirements. This also shows good cyclic stability, thermally-stable capacity energy storage, micro-hardness corrosion resistance, allowing operate stably in hostile environments. We its stem from natural composite microstructure, containing highly-distorted matrix phase glass transition various structural compositional heterogeneities micro- nano-scale. Our findings may provide insight into designing alloys unconventional technologically-important functional properties.