Two-step strain glass transition in NiTi shape memory alloy with unique properties

IF 5.5 2区医学 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Biomaterials Science & Engineering Pub Date : 2024-07-06 DOI:10.1080/21663831.2024.2373285

Qianglong Liang, Dong Wang, Xiangdong Ding, Yunzhi Wang

引用次数: 0

Abstract

We report unique two-step strain glass transition toward different local strain states in NiTi, i.e. R and B19′ strain glasses. This unique transition is evidenced by dynamic mechanical analysis and in-situ HR-TEM. A comprehensive phase diagram is established to illustrate diverse transition pathways and corresponding tunable superelastic properties. This pathway exploits the integrated transition of different phases, lowering the transition energy barrier, yielding superelasticity with large recoverable strain (6%), ultralow modulus (24 GPa) and robust cyclic and wide-temperature stability. Our investigation provides fresh insights into continuous transition pathways among different strain glass states to achieve exceptional properties in shape memory alloys. GRAPHICAL ABSTRACT

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具有独特性能的镍钛形状记忆合金的两步应变玻璃化转变

我们报告了镍钛向不同局部应变状态（即 R 和 B19′应变玻璃）的独特两步应变玻璃转变。动态力学分析和原位 HR-TEM 证明了这种独特的转变。建立了一个全面的相图，以说明不同的过渡途径和相应的可调超弹性特性。这种过渡途径利用了不同相的综合过渡，降低了过渡能垒，产生了超弹性，具有较大的可恢复应变（6%）、超低模量（24 GPa）以及强大的循环稳定性和宽温稳定性。我们的研究为不同应变玻璃态之间的连续转变途径提供了新的见解，从而实现形状记忆合金的优异性能。图表摘要

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来源期刊

ACS Biomaterials Science & Engineering Materials Science-Biomaterials

CiteScore

10.30

自引率

3.40%

发文量

413

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