退火时间对Ti_(49)Ni_(51)形状记忆合金组织与性能的影响  

Effect of Annealing Time on Microstructure and Properties of Ti_(49)Ni_(51) Shape Memory Alloy

作　　者：黄斌[1] 

机构地区：[1]陕西理工大学材料科学与工程学院,陕西汉中723000

出　　处：《铸造技术》2017年第7期1585-1587,共3页Foundry Technology

基　　金：陕西省教育厅专项科研计划资助项目(16JK1138)

摘　　要：采用XRD、OM、SEM研究了Ti_(49)Ni_(51)形状记忆合金在450℃退火40、60和80 min时的组织,并研究了不同状态下其显微硬度和压缩力学性能。结果表明:Ti_(49)Ni_(51)合金450℃退火后晶粒均为细长纤维状;当退火60 min时,合金表现出高的抗压强度和大的弹性应变,表现出较好的超弹性特性和良好的形状记忆效应。The microstructures and mechanical properties of Ti49Ni51 shape memory alloy were investigated by XRD, OM and SEM after annealed at 450℃ for 40 rain, 60 min and 80 rain, respectively. The results show that the grain shape of the Ti^Nis~ alloy annealed at 450℃ is fibrous. Under the annealing time of 60 min, the alloy exhibits the high compressive strength and large elastic strain, which exhibits the good super-elasticity and good shape memory effect.

关 键 词：TI-NI形状记忆合金 退火时间 力学性能 显微组织 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—合金]