材料工程Issue(7)：20-25,6.
冷变形和中温处理对TiNiCr形状记忆合金相变的影响
Effect of Cold-deformation and Mid-temperature Treatment on Phase Transformation of TiNiCr Shape Memory Alloys
摘要
Abstract
The effect of cold-deformation and mid-temperature treatment on the phase transformation behaviors of TiNiCr SMA(shape memory alloys) have been comparatively investigated. The effect of different cold-deformation and mid-temperature treatment on the DSC curve and phase transformation point of TiNiCr shape memory alloys have been researched by differential scanning calorimeter (DSC) and observation of metallographic microstructure photographs. The results show that martensitic transition temperature Ms would rise as the cold-deformation increased until that the cold-deformation increased more than 15 ％, then the Ms is reducing with the the cold-deformation increasing. As and Af reached the peak point when the cold-deformation is up to 15 ％. The martensitic transformation temperature can be significantly improved by heat-treatment which made phase transformation easily. The Ms increasing rate is remarkably increased after heating at 460℃ and decreased with mid-temperature treatment increasing. Under the heat treatment temperature of 400℃, the Ms and Mf will decrease more remarkably as the more time is keeping. The thermal hysteresis As-Ms is not affected by the time of mid-temperature treatment.关键词
TiNiCr形状记忆合金(SMA)/相变/冷变形/中温处理Key words
TiNiCr / shape memory alloy (SMA) / phase transformation/ cold-deformation/ mid-temperature treatment分类
矿业与冶金引用本文复制引用
司乃潮,郑利波,司松海,李镭,翟玉敬..冷变形和中温处理对TiNiCr形状记忆合金相变的影响[J].材料工程,2011,(7):20-25,6.基金项目
科技部科技型中小企业技术创新基金(09C26213201044),江苏省科技型中小企业技术创新资金(BC2007144) （09C26213201044）
