A Ti-Zr-Hf-Ni-Nb high-entropy shape memory alloy with an exceptional strength-ductility synergy for high-temperature application
收藏Taylor & Francis Group2025-10-30 更新2026-04-16 收录
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https://tandf.figshare.com/articles/dataset/A_Ti-Zr-Hf-Ni-Nb_high-entropy_shape_memory_alloy_with_an_exceptional_strength-ductility_synergy_for_high-temperature_application/30484882/1
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资源简介：
A novel Ti<sub>35.16</sub>Zr<sub>5.86</sub>Hf<sub>5.86</sub>Ni<sub>46.87</sub>Nb<sub>6.25</sub> (at. %) high-entropy shape memory alloy (HESMA) is developed for applications in high-stress, high-temperature environments. This alloy consists of B19’ martensitic laths with minor β-Nb and Ti<sub>2</sub>Ni particles along grain boundaries. It demonstrates an exceptional strength-ductility synergy, a relatively-high martensitic transformation start temperature (<i>M</i><sub>s</sub> = 392 K), and outstanding shape memory property with maximum recoverable strain (<i>ϵ</i><sub>mre</sub> = 1.94%) under 550 MPa. This combination of characteristics successfully overcomes the traditional trade-off among <i>M</i><sub>s</sub>, strength-ductility, and shape memory effect. Moreover, the thermal-induced transformation behavior is systematically investigated. This work establishes a paradigm for developing high-performance high-temperature HESMAs.
本研究开发了一种成分为Ti₃₅.₁₆Zr₅.₈₆Hf₅.₈₆Ni₄₆.₈₇Nb₆.₂₅（原子百分比）的新型高熵形状记忆合金（high-entropy shape memory alloy，HESMA），适用于高应力、高温环境。该合金由B19’型马氏体板条构成，晶界处分布有少量β-Nb相与Ti₂Ni颗粒。其展现出优异的强塑性协同效应、较高的马氏体转变开始温度（Mₛ=392 K），以及在550 MPa应力下具备出色的形状记忆性能，最大可恢复应变为ε_mre=1.94%。该特性组合成功突破了马氏体转变开始温度、强塑性与形状记忆效应之间的传统权衡难题。此外，本研究对其热诱导转变行为开展了系统探究。本研究为高性能高温高熵形状记忆合金的开发建立了范式。
提供机构：
Wang, Yinyang; Liu, Haiyang; Liaw, Peter K.; Wang, Tongming; Wang, Zhenhua; Wang, Rui; Li, Xiaona; Wang, Qing
创建时间：
2025-10-30
