有色金属材料与工程2025，Vol.46Issue(4)：55-60,6.DOI:10.13258/j.cnki.nmme.20240415002
基于非晶-纳米晶复相结构形状记忆合金丝材的线性应变传感设计
Design of linear strain sensing technique based on amorphous-nanocrystalline complex structure shape memory alloy wire
摘要
Abstract
Shape memory alloy(SMA)is a typical intelligent material with integrated sensing-actuating-control capabilities.Leveraging its pseudoelasticity and strain-electrical resistance correlation,SMA demonstrates significant potential as a high-resolution strain sensor.However,the pseudoelasticity of SMA originates from martensitic phase transformation,whose first-order nature leads to phase transformation hysteresis and functional fatigue—both of which interfere with the strain-electrical resistance correlation,failing to meet the requirements for high-precision strain monitoring.Here,an amorphous-nanocrystalline multiphase structure is constructed via microstructural tailoring,transforming the typical abrupt first-order phase transformation into continuous behavior.This structure endows the alloy with broadened continuous phase transformation,ultra-low hysteresis,and enhanced functional fatigue stability.The results indicate that amorphous-nanocrystalline multiphase Ni-Ti shape memory alloy(SMA)wires exhibit a highly linear displacement-resistance relationship,excellent cyclic stability,and a long service life.When applied to the three-point bending strain testing of concrete,the SMA-based strain sensing system demonstrates a well-defined load-displacement-resistance signal response and reliable functional stability.关键词
形状记忆合金/非晶-纳米晶/应变传感/复相结构Key words
shape memory alloy/amorphous-nanocrystalline/strain sensing/complex structure分类
化学化工引用本文复制引用
邓国民,施曙东,金琦,王美美,金明江..基于非晶-纳米晶复相结构形状记忆合金丝材的线性应变传感设计[J].有色金属材料与工程,2025,46(4):55-60,6.基金项目
上海交通大学-上海浦兴路桥建设工程有限公司联合研究项目(21H010100125) （21H010100125）
