(哈尔滨工业大学材料科学与工程学院，哈尔滨150001)
摘 要: 研究了冷拔量、热处理}工艺参数对Ti-49.8%Ni合金丝材的超弹性的影响。结果表明不同冷拔量、不同退火工艺处理的丝材获得完全超弹性的温度区间、超弹性特性都不相同，获得最大超弹性应变量的处理的工艺为冷拔星39%、退火温度723 K、保温时间30 min。
关键字: 形状记忆合金 相变超弹性 NiTi形状记忆合金
NiTi SHAPE MEMORY ALLOY
（School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001）
Abstract:Influence of cold drawing and annealing treatments upon pseudoelasticity of NiTi wire with 49.8% Ni has been examined. It was shown that complete pseudoelasticity and different pseudoelastic characteristics were observed over a temperature range up to 45 K under varying cold drawing and annealing conditions. Excellent pseudoelasticity can be obtained in Ti-49.8%Ni wire annealed at 723 K for 30 min after 39% cold drawing reduction.
Key words: shape memory alloy pseudoelasticity NiTi shape memory alloy
