退火温度对Ni50.2Ti49.8合金纤维相变和电阻率的影响  

Effect of annealing temperature on phase transformation and resistivity of nitinol fibers

作　　者：申光 王红娟 赵相辉 史芳杰 杨喜东 聂永胜 SHEN Guang;WANG Hongjuan;ZHAO Xianghui;SHI Fangjie;YANG Xidong;NIE Yongsheng(Lanzhou Seemine Keli Advanced Material Co.,Ltd.,Lanzhou 730000,Gansu,China;Provincial Engineering Lab of SMA materials in Gansu,Lanzhou 730000,Gansu,China;Lanzhou Seemine Shape Memory Alloy Co.,Ltd.,Lanzhou 730000,Gansu,China)

机构地区：[1]兰州西脉科立新材料有限公司,甘肃兰州730000 [2]甘肃省记忆合金材料工程实验室,甘肃兰州730000 [3]兰州西脉记忆合金股份有限公司,甘肃兰州730000

出　　处：《金属功能材料》2025年第1期64-68,共5页Metallic Functional Materials

基　　金：兰州市人才创新创业项目(兰科字[2022]80号)。

摘　　要：采用不同退火温度对冷变形态镍钛合金纤维进行处理,最终获得3种加载/卸载应力平台和弹性模量呈梯度分布的镍钛合金纤维。结果表明:随退火温度升高,冷变形态镍钛合金纤维相变滞后呈线性增大趋势,同时代表应力水平的相变峰宽呈线性降低趋势。此外,在一定退火温度范围内,可实现镍钛合金纤维加载/卸载应力平台和弹性模量精确可控、梯度分布,且合金相变特征温度、带载电阻率特性均趋于一致和稳定,可为微驱动领域用镍钛合金纤维结构设计和成型提供参考。Lanzhou Seemine Keli Advanced Material Co.,Ltd.;Provincial Engineering Lab of SMA materials in Gansu;Lanzhou Seemine Shape Memory Alloy Co.,Ltd.;Nitinol were cold-worked and treated with varying annealing temperatures,three types of nitinol fibers with gradient distributions of loading/unloading stress platforms and elastic moduli were obtained.Results indicate that with the increase in annealing temperature,the phase transformation hysteresis of the cold-worked nitinol fibers exhibited a gradient increase,while the phase transformation peak width,representing the stress level,show a gradient decrease.Additionally,within a certain range of annealing temperatures,it is possible to achieve precisely controllable loading/unloading stress platforms and elastic moduli for the nitinol fibers.Furthermore,the phase transformation characteristic temperature and load-bearing resistivity characteristics of the alloy fibers tend to be consistent and stable,which can bring convenience to the design and forming of nitinol fiber structures for micro-actuation applications.

关 键 词：镍钛合金 应力诱发马氏体相变 弹性模量 电阻率 梯度超弹性 

分 类 号：TQ343.2[化学工程—化纤工业] TG156.2[金属学及工艺—热处理]