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测定相变过程中细镍钛丝的力学性能。

Determination of Thin NiTi Wires' Mechanical Properties during Phase Transformations.

机构信息

Department of Theoretical and Applied Mechanics, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland.

Department of Mechatronics, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland.

出版信息

Sensors (Basel). 2023 Jan 19;23(3):1153. doi: 10.3390/s23031153.

DOI:10.3390/s23031153
PMID:36772191
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9920449/
Abstract

The modern industrial and consumer applications in accordance with the concepts of Industry 4.0 and the Internet of Things are characterized by autonomy and self-sufficiency. This has led to an increase in the interest for the so-called smart materials, capable of combining the functionalities of sensors, actuators and, in some applications, control systems. An important group of smart materials are shape-memory alloys, among which nickel-titanium (NiTi) alloys are the most known. In this article, the influence of phase transformation on the mechanical properties of thin NiTi alloy wires was investigated. During the test, the influence of the heating currents on the displacement and the force generated by the thin NiTi wires were analyzed. The temperature of the wires during heating was measured by a thermographic camera. This study proved the maximum value of the wires' displacement was related to the value of the heating current. During the research, the dependence of the transformation dynamics on the value of the heating currents was also proved. In addition, the influence of the surface inhomogeneity of the thin NiTi alloy wires on the accuracy of the thermographic measurements was analyzed. For the experimental research described in this article, we used the NiTi alloy whose trade name is Flexinol, produced by DYNALLOY (Inc. 2801 McGaw Ave. Irvine, CA, USA).

摘要

现代工业和消费应用按照工业 4.0 和物联网的概念，其特点是自主性和自给自足。这导致了人们对所谓的智能材料越来越感兴趣，这些材料能够结合传感器、执行器的功能，并且在某些应用中还能结合控制系统的功能。智能材料的一个重要类别是形状记忆合金，其中镍钛（NiTi）合金最为知名。本文研究了相变对薄镍钛合金丝机械性能的影响。在测试中，分析了加热电流对薄镍钛丝产生的位移和力的影响。通过热成像相机测量了加热过程中丝的温度。研究表明，丝的最大位移值与加热电流值有关。研究还证明了相变动力学与加热电流值之间的关系。此外，还分析了薄镍钛合金丝表面不均匀性对热成像测量精度的影响。本文实验研究中使用的是由 DYNALLOY（Inc. 2801 McGaw Ave. Irvine, CA, USA）生产的商品名为 Flexinol 的镍钛合金。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e35/9920449/72f95d9a1770/sensors-23-01153-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e35/9920449/cbf622395145/sensors-23-01153-g011.jpg
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本文引用的文献

1
Change in Electrical Resistance of SMA (NiTi) Wires during Cyclic Stretching.形状记忆合金（NiTi）丝在循环拉伸过程中电阻的变化。
Sensors (Basel). 2022 May 8;22(9):3584. doi: 10.3390/s22093584.
2
Assessment of SMA Electrical Resistance Change during Cyclic Stretching with Small Elongation.评估在小幅度拉伸循环时 SMA 的电阻变化。
Sensors (Basel). 2021 Oct 13;21(20):6804. doi: 10.3390/s21206804.